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: So you're back from London, Nancy. W: Yes, I had a special dinner there. M: Oh? How special? Can you tell me about it? W: OK. We had dinner with my old friend Smith. He is an officer in London. When we arrived at the dining hall, all the lights went out. At that time I was a little angry. But then a waiter gave us an explanation, and we laughed. M: Why did the lights go out? W: Because it's a restaurant for the blind.
Who did Nancy have dinner with? (A) A blind man. (B) An old man. (C) An officer