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.

Ex Input:
M: We've just moved into a new house. ,F: Really? Congratulations. ,M: Thank you. I think we want to buy a new television set. ,F: What kind of television do you want to buy? ,M: A color TV set, of course. But I'm not sure about the size. Maybe we should buy a big one. If we buy a small one, we might have to exchange it in a few years for a bigger one. That would be a waste of money. What's your opinion? ,F: In my opinion, I don't think it's necessary to buy a very big one.
(A) M: Why do you think we should get a small TV set but now a big one? (B) M: Yeah. We should buy a small TV set and change it in the future. (C) M: I agree with you. We should buy a big TV set instead of a small one. (D) M: Excuse me, could you repeat the question?

Ex Output:
A

Ex Input:
M: Call your mom and tell her that we will be home later than expected. ,F: Um, we are in the tunnel now and the mobile phones' signals are dead.
(A) M: How do you know that your mom is in the area with poor signal reception? We are not in the tunnel now. (B) M: Can't you make a phone to your mom now, telling her that we will be home earlier? (C) M: Excuse me, could you repeat the question? (D) M: Do you think we should tell mom that someone is dead, even though the mobile phones' signals are good?

Ex Output:
C

Ex Input:
F: Hi, Bob. What time is it now? ,M: Uh, you are wearing a watch, Julia. ,F: My watch is never correct. ,M: It's six. I always have the correct time on my mobile phone. ,F: Although mobile phones aren't as convenient as watches, at least you always know the correct time.
(A) M: Yes, It's hard to believe that I got correct time from the radio instead of cell phones. (B) M: Well, thanks for your watch for telling me the correct time. (C) M: I'm sorry, I didn't catch that. Would you mind speaking more slowly? (D) M: Yes, the phone is very smart and can automatically adjust the time

Ex Output:
D