Which clause in the sentence below is an adverb clause?

we will go to the movies, and then you can visit your friend after you clean your room.

a. we will go to the movies
b. then you can visit your friend
c. after you clean your room

The clause in the sentence that is an adverb clause is C.after you clean your room.

Adverb clauses, or adverbial clauses, are dependent clauses that function as adverbs, so they give more information about the action. Since they are dependent clauses, they are usually introduced by a subordinating conjunction to connect it to the main sentence. Moreover, as they are clauses, these contain both subject and predicate.

In this case, after is the subordinating conjunction that introduce the new subject and verb, that make up the dependent clause. This clause is modifyinh the verb visit.

because most jews were in the concentration camps and dying horrible deaths while anne could be with her family in a warm place with shelter, food, water, and a place to sleep.