The economic system determines the nature of education. ① The political and economic system determines the leadership of education; (2) to decide the rights of the educated; ③ determines the nature of educational purpose and the content of ideological and moral education.

The level of social productive forces determines the scale and speed of education, restricts the training of talents and the specifications of educational institutions, inevitably causes changes in the educational structure, and promotes the development and reform of teaching contents, teaching methods and organizational forms.

So maybe the answer is wrong. It's me. I choose d, too.