What is the preposition in this sentence?

Please silence your phone before the movie.
A. Silence
B. Before
C. Your
D. Movie

My answer is b

Yes, before is a preposition.

Thank you

You're welcome.

Correct! The preposition in this sentence is "before" (option B). A preposition is a word that typically shows the relationship of a noun or pronoun to another word in the sentence. In this case, "before" is indicating the relationship between the action of silencing the phone and the time at which it should be done, specifically prior to the movie. Well done!