Which kind of clause modifies adjectives, verbs, or adverbs?

The answer is an adverb clause. The adverb clause can modify adverbs, adjectives by telling when, where how or what., depending under what situation. Often time adverb clauses would have subordinating conjunctions and also has a subject and a predicate

the answer is actually c   i just got done with the test.

the civil rights act was passed on april 9, 1866 by a republican dominated congress. it was passed over president johnson's veto, in an effort to push back against discrimination of african americans.