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: Talking about the future. I think there will be huge changes in the way people use cars. Laws will be made about what kind of car you can own and when you can use it. ,F: Maybe they'll just be too many of them on the roads. The air will be so seriously polluted that nobody will be able to breathe normally. ,M: Exactly. People will have to rely on trains. ,F: Why do you say that? ,M: Well, we won't be able to use cars and the airports take too much space. That leaves trains. ,F: Huh, so do you think they'll be better trained systems between cities? ,M: Sure, they'll enable people to travel between cities in a matter of hours. There may even be trains going under the oceans to connect the main continents. ,F: Under the oceans? I get nervous enough flying on a plane.
(A) M: I feel as excited as you about train trip under the ocean. (B) M: I'm sorry, I didn't catch that. Would you mind speaking more slowly? (C) M: You don't have to be frightened. You don't even feel nervous flying on a plane. (D) M: Don't be so frightened. Technology will develop in the future and it will very safe taking train under the oceans.
Output:
D