F: Here is $10. I'll pick you up in 30 minutes at the front of the mall. Find a nice gift for your friend's birthday. ,M: Ah. Mom, can't I have 20?
(A) F: No, honey, $10 is good enough, because 40 dollars can buy 4 nice gifts for your grandma. (B) F: No, your grandma won't like it when you give her something too expensive for $30. (C) F: Well, here you are, now you can buy two presents for your friends. (D) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?
C