听力原文:M: Maybe it wasn't a good idea to tell Monica about the surprise party for Cathy
W: I'm not worried at all. She promised not to tell anyone and she doesn't make promises lightly.
Q: What does the woman mean?
(14)
A.Cathy already knows about the surprise party.
B.Monica and Cathy are not good friends.
C.Monica will probably tell Cathy about the party.
D.Monica won't tell Cathy about the party.