Which of the following is a complex sentence that contains a dependent adverbial clause mark expects the photo to a rifle with the letter arrives mark expects the photo arrive on tuesday mark expects a photo to a late mark expects the photo to arrive in damaged condition

D. Mark expects the photo to arrive when then letter arrives.


Example:
This year's fireworks show must have been expensive, which is an annual holiday tradition.

This phrase could have been
This year's fireworks show, which is an annual holiday tradition, must have been expensive.

A clause is segment in a sentence that can stand on its own since it has its own subject and predicate.
Adjective clause is one type of clause that describes a noun or pronoun in the sentence
Another is, adverb clause.