Read the passage below and answer the question that follows.
"If slavery is right, all words, acts, laws, and constitutions against it, are themselves wrong, and should be silenced, and swept away. If it is right, we cannot justly object to its nationality—its universality; if it is wrong, they cannot justly insist upon its extension—its universality. All they ask, we could readily grant, if we thought slavery right; all we ask, they could as readily grant, if they thought it wrong. Their thinking it right, and our thinking it wrong, is the precise fact upon which the entire controversy turns."
— Abraham Lincoln, address at Cooper Union, New York, February 27, 1860
Which of the following political developments during the 1850s best supports the argument in the excerpt that the debate over slavery had become an irreconcilable ideological conflict?
- AThe broad national agreement established by the application of popular sovereignty in new territories
- BThe resolution of sectional differences through compromise tariffs that satisfied Northern and Southern industrial interests
- The collapse of the Whig Party and the emergence of a purely sectional party systemCevap
- DThe transition of the Southern agricultural workforce from chattel slavery to contract-based indentured labor