What attitudes about race did the American Expeditionary Force reflect

What attitudes about race did the American Expeditionary Force reflect?

a. All men, regardless of color, can fight equally and deserve equal opportunities for advancement.
b. Since black and white soldiers fought together in the Spanish-American War, they should do so in World War I.
c. Blacks were considered inferior and should be segregated from whites and not given positions of authority.
d. African Americans and other people of color were considered inferior and therefore not permitted to fight as soldiers but only to serve as support staff.
e. The AEF believed blacks and whites should be completely segregated, so blacks were required to command all black troops.

ANSWER
B