Question

Which words in the sentence are the adverb clause?

Her friend Sima plans to go to the county fair if she finishes her project.

A.
county fair if she finishes

B.
to go to the county fair

C.
if she finishes her project

D.
her friend Sima plans

Answer 1

And adverb clause answers one of these question : Why? When? Where? or How?

So ask yourself, where is Sima planning to go?
To the country fair..

So your answer will be B. to go to the county fair