Identify Which Option Lists All of the Adverb Clauses in the Following

Multiple Choice

Identify which option lists all of the adverb clauses in the following sentence:
When you see the fork in the road, don't go left because that road will dead end in a couple of miles.

A) in the road; in a couple; of miles
B) When you see; don't go left; that road will end
C) When you see the fork in the road; because that road will end in a couple of miles
D) When you see; because that road