单项选择题

Questions 4 to 7 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.

How was the distance learning course different from traditional course

A.Students are not required to attend regular class lecture.
B.The professor videotapes class lecture for review.
C.Classes are held out at various locations throughout the area.
D.Students receive credit for work experience.