听力原文：M: Hi, Christie, I brought you some tea.
W: Thanks, Mark. Too bad it's not apple tea, like in Turkey.
M: You really liked living in Turkey, didn't you？
W: Yeah, it was great.
M: How do you like the food in Turkey, Christie？
W: Oh, the food was fantastic! But people always expected me to eat too much, and I gained a lot of weight there!
M: Yes, it's so polite to be generous. We think people aren't polite if they don't offer a lot of food.
W: I know. I also learnt that it's not polite for the guest to accept the offer of food at first.
M: Yes, that's definitely true! If you're the guest, you must refuse the first two offers of food.
W: The first time I had dinner at a Turkish home, I felt rude to refuse. So I ate all the food the host offered me.
M: Do you know how to stop the host from offering you food？ You must leave some food on your plate. Then the host knows that you're full.
W: Oh, is that the trick？ In the United States, we usually eat everything. You don't want the host to think that you don't like the food.
M: That is the difference.
W: Americans think it's not polite to insist. We don't want to force you to eat more if you don't want more.
Where are these two speakers from respectively？

A. The man is from the US and the woman is from Turkey.
B. The man is from Turkey and the woman is from the US.
C. Both are from the US.
D. Both are from Turkey.