What is this passage mainly concerned？A．Education fund needs social mobility.B．Education n

What is this passage mainly concerned？

A．Education fund needs social mobility.

B．Education needs new policy and reform.

C．Children pay more premiums in schools, so there are difficulties in their lives.

D．Children were recruited from disadvantaged backgrounds, so they are very poor.

请帮忙给出正确答案和分析，谢谢！