Question

The skylights, that were made with aluminum leafing, indicate the time period in which the Great Hall was constructed. How is the comma used incorrectly in the sentence? A) The comma attempts to set apart an essential element. B) The comma attempts to separate a compound subject. C) The comma attempts to separate a compound predicate. D) The comma attempts to join two independent clauses.

Answer 1

The correct answer to this question is letter ". C) The comma attempts to separate a compound predicate." 

The first part of the sentence is the predicate, so it's not trying to separate a subject.
"Then skylights that were made of aluminum siding" isn't a sentence, so it's not an independent clause."