W: Why are you so late? We've been waiting almost an hour and a half. M: I'm terribly sorry. Just as I was leaving, Mr Smith asked me to send a telegram for him. The post office was crowded and I was in line for an hour. Then I raced straight here., Question: How long did the man travel after leaving the post office? (A) About an hour. (B) Two and a half hours. (C) About half an hour.
(C) About half an hour.