单项选择题

Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now, listen to the conversation.
What is the woman’s problem

A. She can’t meet Dr. Pasteur tomorrow morning at 9 a. m.
B. She forgets the appointment with Dr. Pasteur.
C. She has to reschedule her appointment today.
D. She can’t have lunch with Dr. Pasteur tomorrow.