A Potential Explanation for Wage Differences Between Men and Women

Multiple Choice

A potential explanation for wage differences between men and women is that most employers have a preference from the workers. if that explanation is correct which of the following would not be true?

A) Women will self select into firms that don't discriminate
B) the marginal product of female labor would rise
C) As female labor force participation increased the gap between wages would increase
D) Firms are maximizing profits