According to the passage, which of the following is true about women outside the business

According to the passage, which of the following is true about women outside the business world who are currently serving on corporate boards？

A．Most do not serve on more than one board.

B．A large percentage will eventually work on the staff of corporations.

C．Most were already known to the chairs of the board to which they were appointed.

D．A larger percentage are from government and law than are from the nonprofit sector.

请帮忙给出正确答案和分析，谢谢！