How Did World War II Set the Stage for Radical

How did World War II set the stage for radical racial change?

A) In lobbying for the Fair Employment Practices Commission, African American leaders created the first step toward recognition of civil rights.
B) Through their service in the armed forces during the war, African American men proved they were equal to white men.
C) Angered at the racial violence of Nazi Germany, more Americans demanded racial equality in the United States.
D) African Americans' participation in union activities during the war taught them new techniques to fight discrimination.