GMAT Prep Question

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Forum Index GMAT Verbal & Essays Sentence Correction
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leo
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Topic: GMAT Prep Question
PostThu Apr 12, 2007 6:57 pm
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Scientists believe that unlike the males of most species of moth, the male whistling moths of Nambung, Australia, call female moths to them by the use of acoustical signals, but not olfactory ones, and they attract their mates during the day, rather than at night.
(A) by the use of acoustical signals, but not olfactory ones, and they attract
(B) by the use of acoustical signals instead of using olfactory ones, and attracting
(C) by using acoustical signals, not using olfactory ones, and by attracting
(D) using acoustical signals, rather than olfactory ones, and attract
(E) using acoustical signals, but not olfactory ones, and attracting

Answer is c or d? Please expalin.
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k_pankaj_r
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PostFri Apr 13, 2007 5:41 am
i think the answer is 'd'..
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isisalaska
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PostFri Apr 13, 2007 6:06 am
The right Answer is D, "By using is redundant" (so C is out)
also, rather than is preferable than "not using"
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PostFri Apr 13, 2007 9:37 pm
One more point to add.

parallelism:
note that every option has "and". so think of || lism.

...., call female......... and attract .....
D only obeys this.

hence D
is the option that makes it parallel (||) construction
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Cybermusings
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PostSat Apr 14, 2007 3:22 am
I would also go for option D
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