W：Hello，Steve．This is Susan．I’m afraid I won’t be able to attend the party． M：Do come after your meeting. Susan．Our party won’t be over until mid-night． Q：Why did the woman say that she could not join in the party?（）
A．She was afraid she might be kept too late. B．She would have something more important to do. C．She had to meet a friend of hers. D．She was not in the mood to attend the party.