Why Was the Union More Politically Cohesive Than the Confederacy

Why was the Union more politically cohesive than the Confederacy?

A) There was little political dissent in the North because northerners were united in a crusade against slavery.
B) The multiplicity of political parties in the South made Confederate party politics vicious and divisive.
C) The presence of a vocal and politically powerful opposition in the North forced the Republicans to unite behind their leader.
D) Jefferson Davis encouraged dissent as a way of sharpening Confederate resolve.
E) The South had no tradition of vigorous politics or strong political leadership.