问题详情

How does Wieman look at the traditional lectures according to the third paragraph？ 查看材料
A. They have proved to be ineffective and outdated.
B. They can make students more active in study.
C. They have lasted for only a short period time.
D. They continue to play an essential role in teaching.
请帮忙给出正确答案和分析，谢谢！