单项选择题

听下面一段对话，回答第14至第17题。
14-17
M: Hi, Ann, welcome back. How’s your trip to the states
W: Very busy. I had a lot of meetings. So I didn’t have much time to see New York.
M: What a pity. Actually I will have a trip there myself next week.
W: Do you Then take my advice. Do the well-being in the air program. It really works.
M: Oh, I read about that in a magazine. You mean it really works
W: Yes. I did the program on the flight to the States. When I arrived in New York, I didn’t have any problem. No jet lag at all. On the way back I didn’t do it, and I felt terrible.
M: You are joking.
W: Not at all. It really made a lot of difference.
M: Hmm ...So, what did you do
W: Well, I didn’t drink any alcohol or coffee and I didn’t eat any meat or rich food. I drink a lot of water and fruit juice and I eat the meals on the well-being menu. They are lighter. They have fish, vegetables and noodles, for example. And I also did some of the exercises in the program.
M: Exercises On a plane
W: Yes. I didn’t do many, of course. There isn’t much space on the plane.
M: How many passengers did the exercises
W: Not many.
M: And how much champagne did they drink
W: A lot. It was more popular than mineral water.
M: So, basically it’s a choice. Mineral water and exercises or champagne and jet lag.
W: That’s right. It’s a difficult choice.

How does the well-being in the air programs benefit the passengers（）。

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