Because of the bad weather, they didn't continue to climb the mountain. Because B.beca

Test analysis: because, followed by clauses; Because, followed by a noun phrase; Therefore, the result is; Actually. They didn't climb to the top of the mountain because of the bad weather. B can be selected according to the context.

Comments: The key to answering such questions is to understand the basic meaning and usage of each phrase, and pay attention to the phenomenon that it expresses multiple meanings, and then choose the appropriate answer according to the context.