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: Have you seen Dan the Bear? ,F: No, I haven't. ,M: Oh, well, he supposed to give his performance in 10 minutes. All the kids are waiting for him to sing. ,F: Maybe he's out by the fish tank, giving away balloons and talking with the dolphin trainers. Did you check there? ,M: Yes, I did, but they said they hadn't seen him. If you see him, please tell him that he's needed on the small stage as soon as possible. ,F: OK. I'll send a radio message out to all of the security officers and have them look for him. I'm sure he's on his way right now.
(A) M: Thanks for putting up a notice to inform the security officers. (B) M: Thanks for making a telephone call to inform the security officers. (C) M: Thanks for sending a radio message to inform the clothes officers. (D) M: I’m sorry, I don’t understand. Could you say it again?

D