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Here is a detailed explanation to this question-
psdeol wrote:
Although in some women, new studies indicate that abnormally low levels of the light-sensitive hormone melatonin in them may contribute to premenstrual depression, doctors are hesitant to recommend light therapy until additional studies have been completed.
A) Although in some women, new studies indicate that abnormally low levels of the light-sensitive hormone melatonin in them
B) Although new studies indicate that levels of the abnormally low light-sensitive hormone melatonin in some women
C) Although new studies in some women indicate that abnormally low levels of the light-sensitive hormone melatonin
D) Despite the fact that new studies are indicating abnormally low levels of melatonin, a light-sensitive hormone in some women that
E) Despite new studies that indicate that in some women, abnormally low levels of melatonin, a light-sensitive hormone,
Choice A: In Option A, we see a case of pronoun ambiguity; the pronoun "them" could refer to either "studies" or "women". Furthermore, we also see a modifier error; the phrase "in some women" incorrectly modifies the noun "new studies". Thus, Option A is incorrect.
Choice B: In Option B, we see a construction error that alters the meaning of the sentence. The term "abnormally low" should be used to modify the "level" of the "light-sensitive hormone melatonin", but in this answer choice it is used to refer to the hormone itself. Therefore, the intended meaning of the overall phrase changes from 'low levels of the particular hormone' to 'a hormone that is sensitive to abnormally low levels of light'. Thus, Option B is incorrect.
Choice C: Option C also displays a construction error that changes the meaning of the sentence. The phrase "new studies in some women" is improperly constructed and implies that the studies were conducted in some women. This meaning is different from the intended meaning and illogical. Thus, Option C is incorrect.
Choice D: Option D also displays a construction error that changes the meaning of the sentence. The phrase "a light-sensitive hormone in some women" implies that melatonin is only present in some women; this is not the intended meaning of the sentence. Thus, Option D is incorrect.
Choice E: Option E displays correct construction throughout the sentence and conveys the intended meaning of the sentence. Thus, Option E is correct.
Hence, E is the best answer choice.To understand the concept of “Avoiding Pronoun Ambiguity on the GMAT”, you may want to watch the following video (~1 minute):
All the best!
Experts' Global Team