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.

In a distance learning course, one

A.does not have to see the professors.
B.also needs to take exams.
C.reduces the learning expenses.
D.must revise the schedule to attend the course.