M: Something is wrong with my computer. All I'm getting is a black screen. ,F: What's the matter? Did it get a virus? ,M: No, I think my hard drive crashed. Luckily, I have backed up all my files.
(A) F: Excuse me, could you repeat the question? (B) F: You mean your computer screen is broken, so you haven't backed up any files, have you? (C) F: So your computer's hard disk crashed, right? (D) F: So your computer's hard disk crashed, but you didn't back up any files, did you?
C