It is C. Adverb. I'm not just gonna type this senctence so I can post the answer, as it'll be more than 20 characters.
Answer:
You want to get something to eat later?
I think we're gonna win the game.
Toby is taller than Nick.
I wrote him the letter already.
Jenna doesn't know the answer.
We have been reading since 5:30
(Some of these might be wrong like 4 & 6)
Explanation:
<span>the lady's foil character</span>