"Warbler" Tough SC problem from ETS paper exam

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I had a very difficult time figuring out how to best approach this problem. Normally, I am initially able to read the sentence and flag/classify the grammar error. With this question, however, I had a very difficult time eliminating incorrect answer choices because I felt that "Unlike" phrase was the correct way to begin the sentence. I would appreciate the forums incite into how they best eliminated incorrect answer choices to arrive at the best choice. Thanks!

Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.

a. Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.

b. Unlike most warbler species, the gender of the blue-winged warbler is very difficult to distinguish

c. Unlike those in most warbler species, the male and female blue-winged warblers are very difficult to distinguish

d. It is very difficult, unlike in most warbler species, to tell the male and female blue-winged warbler apart.

e. Blue-winged warblers are unlike most species of warbler in that it is very difficult to tell the male and female apart.
[Reveal] Spoiler: OA
Source: — Sentence Correction |

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by selango » Tue Oct 12, 2010 12:08 pm
Check the below post explained by Ron.

https://www.manhattangmat.com/forums/unl ... t4296.html
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by shovan85 » Tue Oct 12, 2010 12:10 pm
I would say it is a difficult one.
IMO E.
It does not sound convincing but if you follow basic rule of comparison only this option fits.

we need to compare warbler species to blue-winged warbler nothing else

A: compares warbler species to the male and female blue-winged warbler
B: to gender
C: This is case of parallelism mismatch. As first clause uses "in" second part is also required to use the same.
D: Very beginning "It" has no antecedent.
E: Left out. but the "it" makes it suspicious. It has an antecedent, this explanation is in the below link
https://www.manhattangmat.com/forums/unl ... t4296.html

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