[听力原文]8-10W: Mother’s Day is coming, what will you send to your momM: I’ve no idea. What about youW: My mom is on a business travel; I guess she can’t be back on that day.M: I heard there would be a special program on the radio on that day. Maybe you can have a try.W: I think she doesn’t have time to listen to the radio.M: Well, you can make a call to remind her before the program.W: Sounds a good idea. Why wouldn’t you try it with meM: That’s right, l’ll choose a song for my mother.W: She’d like it.M: I hope so. Why is the woman’s mother not at home（）

A. Because she is busy.
Because she is on a business travel.
C. Because she likes travelling.
D. Because she wants to get the girl’s wish on the radio.