Read the following early draft of an essay and then choose the best answer to the question or the best completion of the statement.
Passage
(1) Calling someone a rat may be complimentary. (2) In one experiment, University of Chicago neuroscientist Peggy Mason placed 30 pairs of rats in pens. (3) One rat was caged in the middle of the pen, while the other was free to run around. (4) Eventually, 23 of 30 ratis liberated their peers by pushing the cage door open with their heads or leaning against the door until it tipped over
(5) In another experiment, Mason gave rats access to two cages: in one cage was another rat, in the other was a pile of chocolate chips. (6) The rats eating the chocolate themselves. (7) Instead, most of the rodents opened both cages and shared the sweets (8) "In rat land, that is big." Mason says, claiming that this study is the first to show altruistic behavior in rodents.
(9) Not all scientists agree with the conclusion Mason drew from the experiment, however. (10) The jailbreaking rats might have only been trying to silence their cohorts' distressing alarm calls. (11) Mason counters that the alarm calls from the caged rats were not frequent enough to motivate their peers, but both parties are speculating at this point.
(12) Mason's new study is one of many that are changing how scientists think about empathy and altruism, namely: that such characteristics are not limited to people, as they once thought. (13) It now seems that many animals have evolved instincts to help others.
In the context of the passage, what sentence should be inserted immediately after sentence 11 (reproduced below)? Mason counters that the alarm calls from the caged rats were not frequent enough to motivate their peers, but both parties are speculating at this point.
- A. No one will ever really know why rats do what they do
- B. Mason is probably biased anyway because it was her experiment.
- C. More research must be done to arrive at an answer.
- D. Some scientists will complain no matter what
Correct Answer & Rationale
Correct Answer: C
Inserting "More research must be done to arrive at an answer" after sentence 11 effectively emphasizes the ongoing debate and the need for further investigation into the behaviors of rats. This aligns with the speculative tone of the discussion. Option A, while true, does not contribute to the dialogue about the necessity of additional research. Option B introduces bias but distracts from the main focus on research requirements. Option D generalizes scientists' behavior without addressing the specific context of Mason's argument, making it less relevant to the passage's intent.
Inserting "More research must be done to arrive at an answer" after sentence 11 effectively emphasizes the ongoing debate and the need for further investigation into the behaviors of rats. This aligns with the speculative tone of the discussion. Option A, while true, does not contribute to the dialogue about the necessity of additional research. Option B introduces bias but distracts from the main focus on research requirements. Option D generalizes scientists' behavior without addressing the specific context of Mason's argument, making it less relevant to the passage's intent.
Other Related Questions
Which is the best version of the underlined portion of sentence 6 (reproduced below)?
Early on for example my anxiety about getting lost was so bad that I was even scared to go for a walk or to take a bus or the subway.
- A. (as it is now)
- B. on for example,
- C. on, for example,
- D. on, for example
Correct Answer & Rationale
Correct Answer: C
Option C, "on, for example," is the best choice because it correctly uses a comma to set off the phrase "for example," which introduces an illustrative clarification of the preceding idea. This punctuation enhances clarity and improves the flow of the sentence. Option A, "as it is now," lacks necessary punctuation and fails to clarify the relationship between ideas, making the sentence awkward and confusing. Option B, "on for example," omits the comma, which disrupts the sentence's readability and does not properly highlight the example being introduced. Option D, while similar to C, incorrectly uses "on," which is unnecessary in this context and can lead to confusion.
Option C, "on, for example," is the best choice because it correctly uses a comma to set off the phrase "for example," which introduces an illustrative clarification of the preceding idea. This punctuation enhances clarity and improves the flow of the sentence. Option A, "as it is now," lacks necessary punctuation and fails to clarify the relationship between ideas, making the sentence awkward and confusing. Option B, "on for example," omits the comma, which disrupts the sentence's readability and does not properly highlight the example being introduced. Option D, while similar to C, incorrectly uses "on," which is unnecessary in this context and can lead to confusion.
Which is the best version of the underlined portion of sentence 5 (reproduced below)?
Compounding the problem is that food distribution system's currently require a lot of energy.
- A. (as it is now)
- B. systems
- C. systems's
- D. systems
Correct Answer & Rationale
Correct Answer: C
The best version clarifies the possessive form needed in the sentence. "Systems" (option D) is incorrect because it lacks the possessive, which is essential to indicate ownership of the energy requirement. Option B, "systems," does not convey possession either. Option A, "as it is now," does not address the grammatical structure needed in this context. The correct choice, "systems's," correctly indicates that the energy requirement belongs to the food distribution system, ensuring clarity and grammatical accuracy in the sentence.
The best version clarifies the possessive form needed in the sentence. "Systems" (option D) is incorrect because it lacks the possessive, which is essential to indicate ownership of the energy requirement. Option B, "systems," does not convey possession either. Option A, "as it is now," does not address the grammatical structure needed in this context. The correct choice, "systems's," correctly indicates that the energy requirement belongs to the food distribution system, ensuring clarity and grammatical accuracy in the sentence.
Which is the best version of the underlined portion of sentence 12 (reproduced below)?
I've enjoyed the diversity here, and wanting to learn as much as I can about the different sorts of people who live here.
- A. (as it is now)
- B. here and had been wanting
- C. here and I also wanted
- D. here, and I want
Correct Answer & Rationale
Correct Answer: C
Option C improves clarity and grammatical structure by maintaining parallelism in the sentence. The phrase "I also wanted" aligns with "I've enjoyed," creating a balanced structure that clearly expresses both enjoyment and desire. Option A retains the original phrasing, which is awkward and lacks parallelism. Option B introduces a tense inconsistency with "had been wanting," which disrupts the flow and clarity of the sentence. Option D, while clearer than A, uses "I want," which shifts the meaning to the present instead of reflecting a past desire, making it less appropriate in context.
Option C improves clarity and grammatical structure by maintaining parallelism in the sentence. The phrase "I also wanted" aligns with "I've enjoyed," creating a balanced structure that clearly expresses both enjoyment and desire. Option A retains the original phrasing, which is awkward and lacks parallelism. Option B introduces a tense inconsistency with "had been wanting," which disrupts the flow and clarity of the sentence. Option D, while clearer than A, uses "I want," which shifts the meaning to the present instead of reflecting a past desire, making it less appropriate in context.
Which is the best way to revise and combine sentences 4 and 5 (reproduced below)? These elements created an effect of disillusionment and bitter realism. Many of these elements were brought to Hollywood by German directors fleeing their war-torn land.
- A. Many of these elements created an effect of disillusionment and bitter realism they were brought to Hollywood by German directors fleeing their war-torn land.
- B. These elements, many of which were brought to Hollywood by German directors fleeing their war-torn land, created an effect of disillusionment and bitter realism.
- C. These elements created an effect of disillusionment and bitter realism, many were brought to Hollywood by German directors fleeing their war-torn land.
- D. man directors fleeing their war-torn land, which created
Correct Answer & Rationale
Correct Answer: C
Option B effectively combines the sentences by using a relative clause, clearly indicating that the elements created disillusionment and were brought to Hollywood by German directors. This maintains clarity and coherence. Option A incorrectly connects two independent clauses without proper punctuation, leading to a run-on sentence. Option C misuses a comma, creating a comma splice by linking two independent clauses improperly. Option D is incomplete and lacks context, failing to convey the intended meaning about the elements and their effects. Thus, B is the most effective choice for combining the ideas cohesively.
Option B effectively combines the sentences by using a relative clause, clearly indicating that the elements created disillusionment and were brought to Hollywood by German directors. This maintains clarity and coherence. Option A incorrectly connects two independent clauses without proper punctuation, leading to a run-on sentence. Option C misuses a comma, creating a comma splice by linking two independent clauses improperly. Option D is incomplete and lacks context, failing to convey the intended meaning about the elements and their effects. Thus, B is the most effective choice for combining the ideas cohesively.