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: How much are these T-shirts? Are they also on sale? W: Yes, they are usually $30 a piece, but they are on sale and you can get 30 percent off.
How much does a T-shirt cost now? (A) $21. (B) $27. (C) $30.