单项选择题

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now, listen to the conversation.

Why is the man surprised that the woman wants to study linear algebra with him

A. He didn’t know that she was enrolled in a linear algebra course.
B. He thought she preferred to study alone.
C. He thought she had made arrangements to study with.
D. He had told her that he had done poorly on a recent test.