M: Why did you get home so late, Sarah? I was worried sick! ,F: I had everything timed perfectly. I sat in the coffee shop, waiting for Bus 55. It is supposed to leave at 4:45 sharp. I take it everyday at that time because it arrives at the Waterson Station just in time to catch Bus 15. ,M: And you lost track of time, didn't you? ,F: No, Ken, not this time. I was at the bus stop on time and I was picking up my bag and getting to my feet at 4:35. I was two feet from the bus when it suddenly left. ,M: 10 minutes early?
(A) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) F: Right, the bus left 10 minutes earlier. Fortunately, I caught the bus. (C) F: Can you believe that? Bus 20 left half an hour before the scheduled time! (D) F: The bus left exactly an hour before the time, so I had to wait for another two hours.
A