Given the task definition and input, reply with output. In this task, you will be shown a conversation. You need to write a question with three choices for the conversation. Your question should be answerable based on the conversation and only have one correct answer. Note that you don't need to answer your question. "W" and "M" in the conversations stand for "woman" and "man".

M: Welcome back! I didn't see you in the history class on Friday. W: I wasn't here on Friday. My geography class went to a field trip to look at some of the different rocks. In fact, we slept there last night. M: Really? That sounds excellent! Where did you go? W: A desert. It gets hot during the day, but it cools off very quickly at night. It is very dry there after the sun goes down. M: Well, did you enjoy the trip? W: Of course I did. The desert is nicer than you might think. Since there are so few plants growing there, it's very easy to see different rocks. And the natural colors of the rocks shine in the sun. You really should go there to have a look. M: I really want to go there. You must call me if you have the chance to go there again. W: No problem. I will be your guide next time.
What did the woman do on Friday? (A) She prepared for the exam. (B) She attended a class activity. (C) She had a history lesson.