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.

M: Hi, Alice. What are you doing? ,F: I am looking at some old school photographs. ,M: Can I have a look? When was this photo taken? ,F: That photo was taken more than 7 years ago. ,M: Who is this girl? ,F: That's Lily. At first I didn't like her because I thought that she was too serious. She always had high marks in math. One day I found that she was very friendly and helpful. Then we became good friends.
(A) M: Really? Okay, I see. But actually I am very surprised that you thought Lily was serious at first. (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: Oh, it is a pity that at first you thought that she was friendly but then you didn't become good friends. (D) M: So, you mean you thought Lily was caring at first but one day you found that she was not very friendly or helpful?
A