What part did minority soldiers play in fighting for the U. S. during WW II?

A. They refused to fight because they had not been treated well in America.

B. They volunteered for the war, but nonewere allowed to fight on the front lines due
to institutional racism.

C. They fought alongside white Americans in unsegregated units.

D. Some fought on the front lines in segregated units, but most served behind the scenes due to racist policies.