【单选题】听力原文:M: How many students will Professor Smith choose to go on the field trip? W: Whether or not there will be a field trip has to be decided first. Q: What does the woman mean? (14)
A.
She feels that the trip will take too long.
B.
The students haven't chosen a professor.
C.
Professor Smith has to choose the destination first.
D.
It's not certain the trip will take place.