In a Given Market,women with the Same Skills as Men

In a given market,women with the same skills as men earn less.Which of the following would suggest that the main source of discrimination against women is employers?

A) Companies make the same profit whether they hire women or men.
B) Male managers who work with women must be paid more.
C) Companies hiring women offer more daycare and other job amenities favored by women.
D) The companies hiring more women make a larger profit.