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by AnjaliOberoi » Wed Jan 22, 2014 7:12 pm
Structure is not parallel in D.
Also usage of "has been" (present perfect tense- indicating the event may continue) is correct.
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by theCodeToGMAT » Wed Jan 22, 2014 10:19 pm
In {D}, "it was great" is incorrect.. the sentence passage indicates a difference over a period of time.. so we cannot use simple past tense but we need prefect tense.
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by [email protected] » Thu Jan 23, 2014 2:11 pm
Hi shibsriz,

Parallelism shows up on the GMAT in a number of forms (usually in 2 and 3 item lists or comparisons). Here, the SC compares the size difference between males and females; this comparison will require parallel format. Looking at the 2 choices you mentioned, here's what I see:

A: "the size increase in males has been slight" and "the size increase in females has been great"; ALL elements are parallel.

D: "of the size increase being slight for males" and "for females it was great"; NOTHING is parallel.

Answer A is the correct option.

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by GMATGuruNY » Fri Jan 24, 2014 8:13 am
D: The typical size difference between males and females has lessened because of the size increase.
Not the intended meaning: the difference has not lessened because of the SIZE INCREASE itself.
Eliminate D.

Rather, the difference has lessened because of an ACTION -- what the size increase HAS DONE -- as conveyed by the OA:
The typical size difference between males and females has lessened because the size increase in males HAS BEEN slight.
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