In the past several years, astronomers have detected more than 80 massive planets, most of them as large or larger than Jupiter, which circle other stars.


(A) most of them as large or larger than Jupiter, which circle

(B) most of them as large or larger than Jupiter and circling

(C) most of them at least as large as Jupiter, circling

(D) mostly at least as large as Jupiter, which circle

(E) mostly as large or larger than Jupiter, circling

The correct structure is In the past several years, astronomers have detected more than 80 massive planets,most of them at least as large as Jupiter, circling other stars. If you eliminate the part written within a comma pair the sentence should still make sense and so it does. C is the correct answer.

A and B can be eliminated because atleast as large as is better than as large or larger than

D and E can be eliminated because using most of them is better than using mostly

Mostly used in a sentence : Robberies mostly occur during the night.
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