C. is the act of putting pupils into classes according to their academic abilities
D. aims at enriching both their knowledge and experience
* Đáp án
C
* Hướng dẫn giải
Đáp án C Thông tin ở đoạn 1: On the contrary, both their knowledge and experience are enriched. We feel that there are many disadvantages in streaming pupils. It does not take into account the fact that children develop at different rates.