Boundaries: Punctuation and Sentence Structure

SAT Reading and Writing· difficulty 2/5

Mount Vesuvius last erupted in 1944 ______ the volcano remains active and is closely monitored by scientists today.

Which choice completes the text so that it conforms to the conventions of Standard English?

Explanation

Comma plus FANBOYS "yet" correctly joins two contrasting independent clauses. " yet" is a run-on; ", yet," is over-punctuated; ":" misuses the colon since the second clause does not directly explain the first.

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