Which was a key motivation of the Emancipation Proclamation? A.
unrest among northern African Americans
B.
slave uprisings in the South
C.
a military advantage over the Confederacy
D.
the threat of Southern secession
E.
the increased likelihood that Abraham Lincoln would be re-elected

C, a military advantage over the confederacy

Explanation: Lincoln issued the Emancipation Proclamation, not in order to grant slaves their freedom but rather as strategic decision in order to crush the South militarily. When considering Lincoln's primary motivation in the Civil War as a whole, his initial motivation was not, to end slavery but rather to unite the nation.