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.
(A) F: You also heard the news? The air pollution is really serious nowadays. (B) F: You may be right. But I believe that there will be new type of transportation in the future. (C) F: I agree with you that people will have to rely on planes. (D) F: Excuse me, could you repeat the question?
B