If Men,on Average,earn 20 Percent More Than Women in a Particular

If men,on average,earn 20 percent more than women in a particular occupation,

A) this is clear evidence of discrimination
B) some of this differential could be due to differences in human capital
C) most but not all of the differential is due to discrimination
D) comparable worth laws must not be in effect
E) men must have higher skills levels than women