SC doubt

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SC doubt

by prachi18oct » Tue Jun 23, 2015 4:18 pm
Many of today's mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago.

A. are either too time-consuming or involve too many variables to test manually, allowing the exploration of
B. either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore
C. would either take too much time or involve too many variables to test manually, allowing them to explore
D. would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore
E. take too much time or variables to test manually; this capability allows the mathematicians to explore

My question: in E, is the clause after the ";" correctly used? This capability => refers to => using computers to test such cases ???
Source: — Sentence Correction |

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by theCEO » Tue Jun 23, 2015 8:16 pm
prachi18oct wrote:Many of today's mathematicians use computers to test cases that are either too time-consuming or involve too many variables to test manually, allowing the exploration of theoretical issues that were impossible to test a generation ago.

A. are either too time-consuming or involve too many variables to test manually, allowing the exploration of
B. either take too much time or involve too many variables to be tested manually; allowing the mathematicians to explore
C. would either take too much time or involve too many variables to test manually, allowing them to explore
D. would either be too time-consuming or would involve too many variables to test manually; this capability allows the mathematicians to explore
E. take too much time or variables to test manually; this capability allows the mathematicians to explore

My question: in E, is the clause after the ";" correctly used? This capability => refers to => using computers to test such cases ???
The clause after the ";" is correctly used; the error in this choice is that "take too much time" and "variables to test" are not parallel.

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by GMATGuruNY » Wed Jun 24, 2015 3:23 am
I would ignore this SC.
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