The Political Significance of the Great Compromise and the Three-Fifths

The political significance of the Great Compromise and the Three-Fifths Compromise was to:

A) confirm the immorality of slavery.
B) ensure the power of established elites in the face of growing radical forces
C) ensure that the United States would continue to expand westward.
D) reinforce the unity of the North's mercantile forces and the South's planter forces.