The Southern Demand That Slavery Be Allowed to Expand into the Territories

The Southern demand that slavery be allowed to expand into the territories seems to have been motivated by the

A) expectation that slavery would be even more profitable in the West than in the South.
B) fear that free territories would tip the balance of power in the Senate against the South and slaveholding states.
C) belief that expansion was necessary to allow the profitable sale of surplus Southern slaves.
D) assumption of Southern politicians that they should put forward extreme positions as a tactic in political bargaining with the North.