Henry Clay was known for masterminding which two major legislative compromises?

• A. Missouri Compromise and Compromise of 1850
• B. Kansas-Nebraska Act and Emancipation Proclamation
• C. Great Society and New Deal
• D. Monroe Doctrine and Marshall Plan

Answer: (A)

Henry Clay is famous for negotiating and promoting large, multi-part measures that slowed sectional conflict over slavery and kept the Union together. The two major efforts he masterminded were the Missouri Compromise of 1820, which admitted Missouri as a slave state and Maine as a free state, preserving Senate balance and drawing a line (36°30′) to limit where slavery could expand in the new territories; and the Compromise of 1850, a package that admitted California as a free state, organized other territories with decision-making left to popular sovereignty, and included a stricter Fugitive Slave Act while ending the slave trade in Washington, D.C. These moves reflected Clay’s approach: bundle concessions to address competing interests and create temporary, workable solutions to national divisions.

The other options mix in policies or events not associated with Clay’s legislative leadership—more modern domestic programs or foreign policy initiatives, and specific actions not tied to his efforts to mediate sectional tensions.