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OG2016 SC Although, shistosomiasis is not

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OG2016 SC Although, shistosomiasis is not

by lionsshare » Mon Aug 28, 2017 5:37 pm
Although, shistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries

(A) it is so debilitating that it has become an economic drain
(B) it is of such debilitation, it has become an economical
(C) so debilitating is it as to become an economic
(D) such is its debilitation, it becomes an economical
(E) there is so much debilitation that it has become economical.

OA: A

Anyone, kindly explain the POE here. Thanks.
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by elias.latour.apex » Tue Aug 29, 2017 10:57 am
We start, as always, by reading the initial sentence looking for one of the errors that we know GMAT test writers are wont to introduce into these sentences. We find none.

Then we look at the differences between the answer choices. We find that some choices say economic whereas others say economical.

What's the difference between economic and economical? Economical means affordable or inexpensive. For example, "We stayed at an economical hotel."

Economical is not the intended meaning of the sentence. Accordingly, we can eliminate choices B, D, and E.

Sentence (A) contains the correct idiom: so x that (arguably the most tested idiom on the GMAT). There is no reason to believe that (C) improves on it. Although the phrase so x as to y could be idiomatically correct, this sentence does not follow that format, rather it inserts the words "is it" into the idiom unnecessarily.
Elias Latour
Verbal Specialist @ ApexGMAT
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