Respuesta :
A complex sentence is a sentence with a subordinate clause.
In the sentences above "to arrive" is an infinitive phrase, not a subordinate phrase. the subordinate phrase here is "when the letter arrives" so the correct answer is
c. Mark expects the photo to arrive when the letter arrives.
In the sentences above "to arrive" is an infinitive phrase, not a subordinate phrase. the subordinate phrase here is "when the letter arrives" so the correct answer is
c. Mark expects the photo to arrive when the letter arrives.
Answer:
I just took the test, the answer is c.
Explanation: