Because of differences in the humans body's internal pressure and the ocean's, it is essential that a diver returning to

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Because of differences in the humans body's internal pressure and the ocean's, it is essential that a diver returning to the surface ascends slowly or they will suffer a painful condition known as the "bends."


A. differences in the human body's internal pressure and the ocean's, it is essential that a diver returning to the surface ascends slowly or they

B. the difference between the human body's internal pressure and the ocean's, it is essential that a diver returning to the surface ascend slowly or they

C. the difference in the human body's internal pressure and that of the ocean, it is essential that a diver returning to the surface ascends slowly or he

D. differences in the human body's internal pressure and that of the ocean, it is essential that a diver returning to the surface ascend slowly or they

E. the difference between the internal pressure of the human body and that of the ocean, it is essential that a diver returning to the surface ascend slowly or he


OA E

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A. Option A presents a pronoun disagreement issue. The singular subject "a diver" is followed by the pronoun "they," which is plural. This creates a lack of agreement between the subject and the pronoun. Additionally, the phrase "ascends slowly or they" lacks parallel structure, which affects the clarity and flow of the sentence.

B. Option B corrects the pronoun disagreement by using the plural pronoun "they" to refer back to the singular subject "a diver." However, the phrase "ascend slowly or they" still lacks parallel structure and is somewhat awkward. This option could be improved by rephrasing for better clarity and flow.

C. Option C avoids the pronoun disagreement issue by using the singular pronoun "he" to refer back to the singular subject "a diver." However, the repetition of "the difference" in "the difference in the human body's internal pressure and that of the ocean" is somewhat redundant and could be stated more concisely. This option could be clearer with more streamlined wording.

D. Option D also suffers from a pronoun disagreement problem, as the plural pronoun "they" is used to refer back to the singular subject "a diver." This creates an error in subject-verb agreement, impacting the grammatical correctness of the sentence. Additionally, the repetition of "differences" in "differences in the human body's internal pressure and that of the ocean" adds unnecessary redundancy.

E. Option E effectively resolves the pronoun disagreement by using the singular pronoun "he" to refer back to the singular subject "a diver." Additionally, it presents the sentence in a clear and concise manner, avoiding any redundancy or awkwardness. This option maintains subject-verb agreement and pronoun consistency, resulting in a grammatically correct and coherent sentence.

In summary, option E is the best choice as it addresses the pronoun disagreement while maintaining clarity and conciseness in the sentence structure.


Bernard Baah
MS '05, Stanford
GMAT and GRE Instructor
MapAdvantage Prep
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