听力原文:M I have a coupon that gives me 20 percent off on one item. I'd like to apply thi
W Actually, the coupon automatically applies to the most expensive item on your bill. I scan it after I've scanned all your purchases, and it automatically chooses the item.
M Oh, good. I just wanted to make sure it wouldn't be applied to the paper or the scissors or anything like that.
W Nothing to worry about. Okay, your coupon gives you $16 off the file cabinet and your total comes to $105.75. How would you like to pay for that?
What is learned about the coupon?
A.It expires after 60 days.
B.It has a $50 limit.
C.It can be used only at the downtown store.
D.It gives a 20 percent discount on one item.