According to the author, learning should now be done in school for all the following reaso

According to the author, learning should now be done in school for all the following reasons EXCEPT that______.

A．more subjects are to be covered

B．more parents should be involved in teaching

C．there should be a deeper understanding of a subject

D．more time is needed for becoming independent

请帮忙给出正确答案和分析，谢谢！