Given the task definition and input, reply with output. In this task, you will be shown a conversation and a question. You need to answer the question and choose the correct option based on the conversation. "W" and "M" in the conversations stand for "woman" and "man".

M: OK, so I think that's everything: three oranges, four apples, one pineapple, and a watermelon. W: Yes, that should do it. This is going to be the best fruit salad ever!, Question: How many kinds of fruits are the speakers buying? (A) Three. (B) Four. (C) Five.
(B) Four.