Select the sentence with a clause used as a modifier to the verb. the man who came here yesterday was selling magazines. we left the performance early because we were tired. the reason he opened the door was that the princess pointed to it.

We left the performance early because we were tired.

In this sentence, the verb is "left" as this is the word that tells us what the action of the subject (we) is. A modifier adds information to the verb by describing where, when, why or how the action happened. In this sentence, the phrase "because we were tired" tells us "why" the action described by the verb happened. Therefore, this phrase is a modifier.