Which of the following best sums up the authors main point？A．The apprenticeship system was

Which of the following best sums up the authors main point？

A．The apprenticeship system was effective in learning.

B．Students should be given more freedom in learning.

C．Students develop their interest through learning.

D．Learning to solve problems is learning through responsibility.

请帮忙给出正确答案和分析，谢谢！