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: May I help you? W: Yes, I would like to buy a swimming suit for my elder sister as a birthday present. M: What size does she wear? W: Medium. The same size as I do. M: Would she like this style? W: No, do you have something different from this one? M: What about this one? W: The style is fine, but the color is too dark. Do you have something brighter? M: How about this one? W: It's too expensive. Do you have something cheaper? M: Yes, we do. There is a budget department on the first floor. Why don't you check there? W: Okay. Thank you very much.
For whom is the woman going to buy a swimming suit? (A) Her elder sister. (B) Her younger sister. (C) Her daughter.