Given the task definition and input, reply with output. In this task you are given a small conversation between two persons and 4 options on how the conversation should continue. Your job is to choose the most reasonable option. The conversation and the options are separated by a newline character. Each dialogue in the conversation are separated by a comma. F and M indicate female and male, respectively.

F: I can't find my research essay file anywhere on here. Did you delete it? ,M: Of course not. I don't even know your password. Have you saved a copy anywhere? ,F: No, I wish I had emailed it to myself, Ah, I did my work on time but the teacher will never believe that.
(A) M: Excuse me, could you repeat the question? (B) M: Since you didn't finish your homework on time, why are you still sad because you lost it? (C) M: I never thought you would be sad because I deleted your essay, I just knew your password, so I deleted it carelessly. (D) M: I can understand your sadness about losing your homework.
D