Which of the Following Statements About African American Army Units

Which of the following statements about African American army units in the Union is accurate?

A) Despite lower pay than whites, they saw significant action and suffered heavy losses.
B) They did little fighting due to discrimination, and few benefited from the experience.
C) Although given the title of soldiers, they were only allowed to do manual labor.
D) They were most commonly formed in border states, as they showed less discrimination.
E) Far fewer were recruited after than before the Emancipation Proclamation.