Despite the fact that the United States is a superpower, American high school students perform more poorly on tests of world geography and international affairs than do their Canadian counterparts.

A) American high school students perform more poorly on tests of world geography and international affairs than do

B) American high school students perform more poorly on tests of world geography and international affairs as compared with

C) American high school students perform more poorly on tests of world geography and international affairs as compared to

D) the American high school student performs more poorly on tests of world geography and international affairs than does

E) the American high school student performs more poorly on tests of world geography and international affairs as compared with

Source: GMAT Sentence Correction by Brandon Royal
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GOOD LUCK!

So in this sentence we are not comparing the performance of American high school students to their counterparts, we are saying one is perfoming better than the other.

Because of this reason we will eliminate B, C and E.

After the underline portion, “ their” is a plural refrent.

We will eliminate D as it is comparing a singular student with many.

Answer A

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