Answer :
Final answer:
The first sectional compromise over the extension of slavery was the Missouri Compromise of 1820.
Explanation:
The first sectional compromise over the extension of slavery was the Missouri Compromise of 1820, not the Compromise of 1850. The Missouri Compromise aimed to maintain a balance between slave and free states by admitting Missouri as a slave state and Maine as a free state, and establishing a line across the Louisiana Territory limiting slavery.
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