According to the passage, what is the real reason in blocking women from the higher positi

According to the passage, what is the real reason in blocking women from the higher positions？

A．The deficiency of experience on the mainstream of the corporations.

B．The relatively bad performance of the corporations.

C．The male-elite system existing among the corporations.

D．The hierarchical system among the corporations.

请帮忙给出正确答案和分析，谢谢！