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nverma
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i thought you can't start off with a prepositional phrase (of which) after a colon... it just doesn't make sense.

unless the original sentence above is miswritten, i would go with E...

The following should be correct though:

This process resulted in a total of 15 new townships, 7 of which, to date, are still in existence.
This process resulted in a total of 15 new townships: 7 of them are still in existence.
etc.

correct subgroup modifiers:
some of which are ...
some of them ...
some ...
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A...The rest have poor grammar and they all repeat 15 which to me seems as gmat redundancy
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I am quite confused here between A and E.

can someone explain?
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110% A. Others are just to be killed :-)
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nverma
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the answer has to be E..
What we have in the question is a colon (:) and we can never start an an independent clause after a colon..
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Mahattan SC said the correct answer is not necessarily the perfect sentence, it is just the best of all answer choices. It may sound wordy but it has best grammar of all, it can still be the answer.

Moreover, in Mahattan SC, concision is the last to consider, it means we should consider grammar before concision.

This is from Gmatclub test and the official answer is E. However I don't know what's wrong with A too :(
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+1 A
We need the most clear and least ambiguous pronoun. "which" is that pronoun.

Yes, "still exist" would be better because is more concise. However, you must understand that the GMAT can show a question which is not perfect. (Hey, I don't make the test!)



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