The tarantula communities gain their strength through

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The tarantula communities gain their strength through a division of labor, with some members specializing in web repair, some in attacking and subduing prey.

A some in attacking and subduing prey

B and some to attack and subdue prey

C and some by attacking and subduing prey

D with some to attack and subdue prey

E and in attacking and in subduing prey

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by AnjaliOberoi » Sat May 24, 2014 7:45 am
is it {A}?

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by AnjaliOberoi » Sat May 24, 2014 7:47 am
is it {A}?

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by AnjaliOberoi » Sat May 24, 2014 7:48 am
is it {A}?

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by kinji@BTG » Mon May 26, 2014 10:16 am
aditya8062 wrote:The tarantula communities gain their strength through a division of labor, with some members specializing in web repair, some in attacking and subduing prey.

A some in attacking and subduing prey

B and some to attack and subdue prey

C and some by attacking and subduing prey

D with some to attack and subdue prey

E and in attacking and in subduing prey
with some members specializing in web repair, some [members specializing] in X and Y. - perfect parallelism.

Hence A) should be correct.

B and some to attack and subdue prey - Breaks the parallelism - Incorrect

C and some by attacking and subduing prey - Breaks the parallelism - Incorrect

D with some to attack and subdue prey - Breaks the parallelism - Incorrect

E and in attacking and in subduing prey - There is a meaning error here.
Normally we say some doing X while others doing Y. Per the sentence, not everybody doing all the tasks. If that is the case, Option E) might be correct.
In this context - Incorrect