How did the enlistment of Black soldiers affect the Union army?
A.It boosted the size and strength of the Union's army over the Confederate army.
B.It increased the Union army's ability to seize supplies and cut railroad lines in the South.
C.It demoralized Confederate soldiers so that the Union army could win more battles and boost the Union's morale.
D. It enabled the Union army to launch attacks along the Mississippi River and seize supplies.