The answer is A because an adverb phrase is two or more words that act as an adverb. An adverb is an adjective that describes the verb. In this case, the adverb would be "slowly."
The answer to this will be despairing
Hiss can work i hope i helped
Are you supposed to correct the grammar?
If so, here's the answer:
Last summer, I went to France, because my aunt works there.