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: F: I saw a beautiful fish in the market the other day, it was orange and blue. I'm thinking of buying some next Sunday. ,M: Where would you keep them? ,F: In that round bottle over there. ,M: It's a bit small, isn't it? ,F: So are the fish. ,M: I think you should get a tank if you want to keep fish. ,F: Really? ,M: Yes, you should never keep fish in a small round bottle. They don't get enough air. I suggest we go shopping together and look for a nice tank. ,F: That might be quite expensive. ,M: Check the prices before you buy one and you ought to put a few large rocks in the tank. Fish love swimming around the rocks and through holes in them. ,F: Is there anything else that I ought to get? ,M: Yes, you need to get some underwater plants, for one thing they keep the water clean, also they make the tank look much prettier.
(A) F: Oh, I see. Some underwater plants will keep the water dirty but will let the fish swim around. (B) F: So, you mean underwater plants will make the tank look much ugly but can give the fish enough air. (C) F: Yeah, I agree with you. Some underwater plants are needed because they will keep the water clean. (D) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?

C