You will be given a definition of a task first, then some input of the task.
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: Are you going to take part in the school singing contest? ,M: No, I don't think so. ,F: Why not? You have a great voice and you sing at her local community center every Sunday, don't you? ,M: Thanks, well. Yes, I do sing at the community center, but that is with a whole bunch of other people. I get really nervous singing in front of many people just by myself. ,F: You could form a group with someone, that way you may feel more relaxed. ,M: That sounds like a good idea. ,F: Actually, Mary, John and I are going to take part in the contest as a group. Why don't you join us? It would be more balanced to have 2 girls and 2 boys and I'm sure we will sound great.
(A) M: I'm happy to join you, but can you tell me what you and the other two persons have practiced? (B) M: I'm sorry, I don't understand. Could you say it again? (C) M: Thank you for inviting me to join you, Helen and Johnson, I would think about it and tell you later. (D) M: If I join you, we will be a group of five. Tnakn you for inviting me, but I enjoy singing alone more.
Output:
A