Final answer:
The Missouri Compromise, the Compromise of 1850, and the Kansas-Nebraska Act all aimed to deal with the growing tensions over the issue of slavery, specifically its extension into new territories and states which led to increased sectional conflict.
Step-by-step explanation:
The Missouri Compromise, the Compromise of 1850, and the Kansas-Nebraska Act are all significant pieces of legislation in U.S. history that attempted to address the major national issue of slavery. Specifically, they attempted to resolve conflicts associated with the extension of slavery into new territories and states. The Missouri Compromise of 1820 admitted Missouri as a slave state and Maine as a free state, while banning slavery north of the 36°30' parallel in the Louisiana Purchase territory. The Compromise of 1850 introduced the Fugitive Slave Act, admitted California as a free state, resolved boundary disputes, and enacted popular sovereignty in Utah and New Mexico territories. The Kansas-Nebraska Act of 1854 allowed residents of Kansas and Nebraska to decide the issue of slavery for themselves under the doctrine of popular sovereignty, effectively nullifying the Missouri Compromise line and leading to violent conflict in what was called 'Bleeding Kansas'.
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