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".

W: Nike, why don't you come and join us this afternoon? It'll be a lot of fun. M: I'd love to, but I've got an exam. W: What about tomorrow afternoon? M: Saturday is OK.

When does the conversation take place? (A) On Friday. (B) On Saturday. (C) On Sunday.