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: Excuse me， could you show me the way to the nearest subway station. ,M: Of course, go straight down this road, take the second turning on your right, then you will see a big supermarket on the left. The station is just next to it. ,F: Is it far from here? ,M: No, not really. It's just 10 minutes walk.
(A) F:  Okay, so it takes 10 minutes to go to the nearest subway station on foot. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F:  Okay, so it takes 10 minutes to go to the nearest subway station by taxi. (D) F:  Okay, so it takes 20 minutes to go to the nearest subway station by taxi.

A