Question

which is a dependent clause?
during intermission, while we were discussing the performance
dodging frantically, a valet ran through the crowd and into the theater
dashing after him, two police officers plowed through the lobby crowd
discussing the commotion, we decided it was more exciting than the play

Explanation:

A dependent clause has a subject and a verb but cannot stand alone as a sentence. "while we were discussing the performance" has the subject "we" and the verb "were discussing" and is introduced by the subordinating conjunction "while", making it dependent. The other options are either phrases (lack a subject - verb combination in the part that could be a clause) or independent clauses (can stand alone).

Answer:

during intermission, while we were discussing the performance