F: Thanks a lot for coming again. ,M: Tell me what happened this time? Is it the keyboard again or the mouse? ,F: Well, the keyboard is ok now, and the mouse is working well, too, even though you suggested that I get a new one last time. Actually the problem is when I was working this morning, the screen suddenly went black.
(A) M: So there is something wrong with your screen as it suddenly went black. (B) M: Excuse me, could you repeat the question? (C) M: You mean that your keyboard was broken, right? (D) M: So your screen suddenly went black and your mouse is broken.
A