A、In a grocery store. B、In a bank. C、In a book store. D、In a post office. AWhere does the conversation most probably take place?

W: All right, that comes to ＄20.75. Do you have one of our store membership cards?
M: What is that?
W: It’s a free card which allows our customers to receive special discounts. You simply need to fill out our membership application form.
M: No, thank you. I’m a little pressed for time.
W: How will you be paying for that? Will that be cash or credit?
M: I think I’ll pay with my card.
W: OK. Is that a credit card or a debit card?
M: I’m sorry. I don’t understand your question. What is the difference?
W: A credit card bills you once a month; a debit card deducts the money directly from your bank account.
M: Well, this is an ATM card issued by my bank. It’s connected to my bank account. Can I use that?
W: Sure, that’s a kind of debit card. Please press the button marked "DBT" and swipe your card through the machine.
M: OK. And now what do I do?
W: Please enter your pin number, the identification number which verifies your identity.
M: OK. And now?
W: Paper or plastic?
M: I’m sorry? What did you say?
W: I’m going to pack your groceries. What kind of hags would you like, paper or plastic?
M: Plastic, please. Wow, you really have to make a lot of decisions in an American grocery store.