F: Did you come to work on time? ,M: No, I came late because my car wouldn't start.
(A) F:  It must be something wrong with the engine so you couldn't get your car going. (B) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) F: I'm sorry to hear that you had an accident this morning, is everything all right? (D) F: Since you couldn't get your car going, you were late for the movie.
A