【单选题】

Woman: I wonder if you could sell me the Psychology textbooks. You took the course last semester, didn’t you

Man:As a matter of fact, I already sold them back to the school bookstore.
Question: What do we learn from the conversation
A．The woman has to get the textbooks in other ways.
B．The woman has sold her used textbooks to the bookstore.
C．The man is going to buy his textbooks from a bookstore.
D．The man doesn’t want to sell his textbooks to the woman.