Sentence Correction (SC) | Re: Most of Portugals 250,000 university students boycotted

In my opinion, there is another reason whyOption (E) is incorrect .

(E) consists of an idiom error, which has probably been overlooked by most of us.

The word "contribute" in GMAT is idiomatically followed by the preposition "to" or "towards" in every sentence, whether it is used as a verb or an infinitive.

Option (E) lacks the preposition "to" or "towards". Hence, it is incorrect.

Refer the article below. I find it helpful in learning a handful
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