Read the passage below and answer the question that follows.
"How can the Union be saved? To this I answer, there is but one way by which it can be, and that is by a simple act of justice, and a duty; to give to the South an equal right in the acquired territory, and to do her duty by causing the stipulations relative to fugitive slaves to be faithfully fulfilled—to cease the agitation of the slave question, and to provide for the insertion of a provision in the Constitution, by an amendment, which will restore to the South, in substance, the power she possessed of protecting herself before the equilibrium between the two sections was destroyed..."
— John C. Calhoun, Senator from South Carolina, speech to the Senate, March 4, 1850
Which of the following developments in the 1850s most directly threatened the conditions Calhoun argued were necessary to save the Union?
- AThe escalation of sectional tensions driven primarily by disputes over federal import tariffs rather than debates over slavery.
- BThe adoption of popular sovereignty, which authorized the President to directly determine whether a new territory would permit slavery.
- The rise of the Republican Party, which campaigned on a platform opposing the expansion of slavery into the Western territories.Answer
- DThe proposal by Northern free-soilers to transition Southern plantations from chattel slavery to a system of colonial-style indentured servitude.