The Observation That in Many Occupations Only Green People Are

The observation that in many occupations only green people are employed while in others only purple people are employed is evidence that

A) discrimination has forced the purples and greens into the different occupations or that human capital differences may have accounted for the crowding into the different occupations.
B) employer discrimination has forced the crowding of the occupations.
C) purples have more children than greens.
D) purples have higher productivity than greens due to the human capital that purples have acquired.
E) statistical discrimination has forced the purples and greens into the different occupations.