F: Did you go to the concert last night? ,M: Oh, it was supposed to start at 8:00 PM. But it was delayed 15 minutes.
(A) F: Do you mean the concert last night didn't start until 8:15 PM? (B) F: So the concert last night started at 8:00 PM and you arrived at 8:15 PM? (C) F: Since the concert last night started at 8:15 p.m., why were you fifteen minutes late? (D) F: I didn’t hear you. Please could you tell me again?
A