How Did World War II Contribute to Changing Understandings of Race

How did World War II contribute to changing understandings of race in the U.S.?

A) Nazi atrocities, committed in the name of racial purification, shocked the conscience of many Americans, who began to question their own prejudices.
B) American interest in eugenics, the belief that a society should control its population by controlling who could reproduce, increased.
C) Americans began to worry about the financial cost of maintaining "separate but equal" facilities for whites and non-whites because World War II has been so expensive to fight.
D) Americans began to see women as competent employees because of their performance in factories during World War II.