【单选题】

Woman: Mark, you shouldn't have been too neglectful and thoughtless about drugs.Man: I know what you mean. But I equally know what I am doing and where I am going.Question: What is the man's reaction to what the woman said
A．He turns a deaf ear to it.

B．He agrees with it.
C．He thinks the woman is thoughtless.
D．He is glad of hearing it.