单项选择题
W: Did you read that letter in the newspaper about smoking The person who wrote that must be crazy. M: I don’t think so. I think the government should do everything it can to discourage people from smoking. W: Maybe so. But a law prohibiting cigarettes would do no good.
What are the two speakers talking about() A．A man.
B．A letter in the newspaper.
C．A law.
D．The government.