单选题 Woman: What's the difference between a lesson and a lecture?
Man: Well, they are both ways of imparting knowledge, but the main difference is that you participate in a lesson whereas you just listen to a lecture. A lecture is generally given to a much larger group.
Question: What does the man mean?
A. A lesson requires students' active involvement.
B. Students usually take an active part in a lecture.
C. More knowledge is covered in a lecture.
D. There is a larger group of people interested in lessons.