听力原文：M: What a delicious meal! Waitress, can I have the bill？ I'm afraid I haven't bro

ught enough cash with me. Do you honor credit cards？

W: Here it is, sir. Your bill totals 100 dollars. You can use two kinds of credit cards, American Express and State Express.

M: That is fine. I have the American Express. Here is 15 dollars; that's my tip for you.

W: Thank you very much, sir.

Where does the conversation happen probably？

A．In the post office

B．In the bank

C．In the restaurant

D．In the company