The pesticide Azocide, introduced to central valley farms

Question

The pesticide Azocide, introduced to central valley farms three
summers ago, has proven ineffective  because other pesticides'
chemical compositions already in wide use  neutralizing its 
desired effect.

 (A) because other pesticides' chemical compositions already
in wide use 
 (B) because of the chemical compositions of the pesticides
already in wide use 
 (C) due to other pesticides already in wide use, whose
chemical compositions have been 
 (D) since, due to the chemical compositions of other pesti-
cides already in use, those pesticides have been 
 (E) because of other pesticides and their chemical compo- 
sitions already in use, which have been 

Vivek.

monarc · Answer

I would go with E on this one...tough choice between b and e ....i think b has a continuity problem...but it is concise though.........

Paul · Answer

I vaguely recall seeing this problem in the past. Definitely can't remember what the answer was and my pick now would be C

gmatfordays · Answer

I go with C on this one.

The pesticide Azocide, introduced to central valley farms three 
summers ago, has proven ineffective  due to other pesticides already in wide use, whose chemical compositions have been  neutralizing its 
desired effect.

Dharmin · Answer

I vouch for "B", rationale goes like this:

For "c", whose seems ambiguous pronoun reference in the same ways, "E" also has "which"

Whereas, "B" is concise having clear pronoun reference and clearly saying "chemical compositions of other pesticides are in wide use "

Vivek, please reveal official answer..

Dharmin

vivek_dj · Answer

The correct answer to this question is (C).  

The original sentence (A) is faulty in two respects. First, it improperly uses "because" instead of "because of." Second, the construction leaves it unclear as to whether the modifying phrase "already in wide use" refers to "other pesticides" or to "chemical compositions."

(B) misuses the phrase "because of." The author should follow this prepositional phrase with a modifying clause by inserting a comma followed by "which" after "in wide use" ("in wide use, which").

(C) corrects the misuse of "because" by replacing it with "due to."

(D) is redundant in its use of both "since" and "due to." This redundancy results, in turn, in an awkward construction.

(E) misplaces the adverbial clause "already in use," which is intended to refer not to "chemical compositions" but rather to "other pesticides."

Vivek.

Dharmin · Answer

Awesome vivek

Thanks indeed pal ! I should really acknowledge your such a meticulous reply for "B". Chemical compositions of the pesticides is a noun phrase requires comma and relative pronoun like "which" followed to it. Dharmin

hallelujah1234 · Answer

OG clearly says "due to" is synonymous with "attributable to".

The pesticide Azocide, introduced to central valley farms

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