A、A landlord. B、A publisher. C、An operator. D、A real estate agent. D女士说她想租一套两居室且配有空调和暖气，男士请女士告诉他她的名字以及她想在哪儿住。由此可知，这位男士很可能是一名房地产中

W: Mary is annoyed after someone told her that her pearl necklace was very valuable.
M: What a pity! If only she were told earlier. You know, she sold it for only 500 dollars.
Q: Why is Mary so annoyed?

W: I want to rent an apartment. I’d like two bedrooms with an air conditioner and the heating system.
M: All right. Have a seat, please. First of all, please tell me your name and where you’d like to live.
Q: What does the man do?