Definition: 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.
Input: M: I haven't seen you for a long time, 2 months right? What have you been doing? ,F: I've just been studying the piano. ,M: How is it going? ,F: Not too well, I failed the test for my degree a week ago, so I have to practice more.
(A) M: How was your piano test a month ago? (B) M: I didn't know that you took a violin test a week ago. (C) M: I didn't know that you took a piano test a week ago. (D) M: I’m sorry, I don’t understand. Could you say it again?

C