In which sentence does the adverb clause modify an adverb?

answer:

an adverb clause is a dependent clause that modifies a verb, adjective, or another adverb. it usually modifies the verb. adverb clauses are introduced by subordinate conjunctions including after, although, as, as if, before, because, if, since, so that, than, though, unless, until, when, where, and while.

explanation:

a

explanation:

because i the point in view is between characters