问题详情

Jack: How time flies! Another Friday again？ Susan: Oh, yes. I haven"t realized that. Jack: Do you have any plans for this Saturday afternoon？ Susan: ______ Why ？ Jack: I"m wondering if you"d like to go to a movie with me. Susan: I"m afraid we"ll have to change the date.
A．I am free for the whole day.
B．I don"t have any plans.
C．I have a prior engagement at three.
D．I"m not quite sure for the moment.请帮忙给出正确答案和分析，谢谢！