An adverb clause is a dependent clause used as an adverb in a sentence to indicate time, place, condition, contrast, concession, reason, purpose, or result.

No one may leave the school until the principal finishes the announcements.

Identify the adverb clause in the sentence.
Responses
A may leavemay leave
B until the principaluntil the principal
C may leave the schoolmay leave the school
D until the principal finishes the announcements

B until the principal finishes the announcements