The sentence that contain an adverb clause is Darla set up a studio because she enjoyed painting and as Aaron was having a midnight snack, he heard a loud noise coming from the basement.
An adverb clause is a word that act as an adverb and is a dependent clause. They change the main verb in the independent clause.
Now, in the sentence A and B. It has a subordinate conjunction present that connects the rest of the sentence.
Thus, the correct option is A and B.
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