A、The man should pick up Nancy and Peter as well. B、The man shouldn’t have promised to pick up Nancy. C、Nancy and Peter should g

W: Since it’s the rush hour, let’s take the subway.
M: OK. It’s not as direct as the bus, but it’s faster and there will be less chance of a traffic jam. I think it is the best choice for us right now.
Q: Why do the man and the woman make such a decision?

M: I must be going now — I promised to pick up Nancy.
W: Since you’re going to pick up Nancy from the fitness class, why don’t you kill two birds with one stone and pick up Peter after his ballet class?
Q: What does the woman mean?