F: Oh dear! I wish we had taken the lift. ,M: If I had known it was so far up, I wouldn't have suggested walking.
(A) F: Are you suggesting that you enjoy walking down a hill? (B) F: I didn’t hear you. Please could you tell me again? (C) F: We should climb stairs instead of taking the lift. (D) F: Let's discuss the trip together on top of the skyscraper. It would only take us less than a minute by lift.
B