How Did World War II Affect Racial Attitudes in the U.S

How did World War II affect racial attitudes in the U.S.?

A) Denunciations of Hitler's policies made Americans think less favorably about their own segregationist system.
B) The Army began to integrate African American soldiers into previously all-white units because it believed that segregation was fundamentally wrong and irreconcilable with America's democratic ideals.
C) The service of African Americans in World War II diverted attention away from race relations in the U.S.
D) Surveys showed that more white officers held unfavorable opinions of African Americans after serving with African American units during the war.
E) None of the above