Which of these statements MOST accurately describes the role of African-Americans in the Civil War effort on the Union side?

Responses
A African-American troops were responsible for the Union victory at Gettysburg.African-American troops were responsible for the Union victory at Gettysburg.
B They traveled with the white soldiers as servants and laborers but saw little to no combat action.They traveled with the white soldiers as servants and laborers but saw little to no combat action.
C They fought with the Union troops from the very beginning and distinguished themselves throughout the War.They fought with the Union troops from the very beginning and distinguished themselves throughout the War.
D Lincoln hesitated to use black troops, but many enlisted and played an important role in the Union victory.

C They fought with the Union troops from the very beginning and distinguished themselves throughout the War.