参考答案：C

解析：[听力原文]
M: You’re going to make a trip to San Francisco, aren’t you
W: Yes, but I haven’t got the plane ticket yet. I’m thinking of postponing the trip to next month since this is the busiest month for the airlines.
Q: What do we know about the woman from this conversation

由选项中的trip，manage，change可知，此对话可能与女士能否去旅行有关，而D却与此无关，故首先排除。再根据对话中提到的I’m thinking…busiest month for the airlines可知，因为这个月是航空公司最忙的一个月，所以她决定把旅行推迟到下十月，故答案为C。