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Christopher Columbus and a Highway

Expert replies
by rjain84 » Sat May 25, 2013 6:42 pm
The greatest road system built in the Americas prior to the arrival of Christopher Columbus was the Incan highway, which, over 2,500 miles long and extending from northern Ecuador through Peru to Southern Chile.

A) Columbus was the Incan highway, which, over 2,500 miles long and extending

B) Columbus was the Incan highway, over 2500 miles in length, and extended

C) Columbus, the Incan highway, which was over 2500 miles in length and extended

D) Columbus, the Incan highway, being over 2500 miles in length, was extended

E) Columbus, the Incan highway was over 2500 miles long, extending

OA: E

I am confused between B and E. Can't get why B is an incorrect choice?
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Source: — Sentence Correction |

by positiveamal » Sun May 26, 2013 8:50 am
Problem with B: The subject of the sentence would be 'The greatest road system' and not 'Incan highway'.
'Over 2,500 miles in length' modifies 'Incan highway', that is fine. But, 'was extended ....... to Southern Chille' works for the subject 'The greatest road system' and not 'Incan highway'.
That's the problem with option B and hence it is wrong. Go with E.
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