The demand for abolition of slavery was linked with which moral idea?

Correct answer: Humans should be free

The governing moral concept is human liberty and the belief that no person should be owned or forced to work by another. Abolitionists challenged slavery because it denied freedom, dignity and basic human rights. This argument connected with the broader language of the French Revolution, especially liberty and equality, although revolutionary governments did not apply those ideals consistently to everyone at first. Option A is correct because the demand for abolition rested on the principle that human beings should be free rather than treated as property. Options B, C and D support hierarchy, exploitation or expanded domination, so they contradict the moral reasoning behind abolition. The question tests the ethical foundation of the movement, not merely a date or institution. Economic changes and resistance by enslaved people also mattered, but the central moral claim was universal human freedom.