One of the main goals of the Missouri Compromise was to:

A. give individual landowners the choice over whether to use the labor of enslaved people.
B. maintain a balance of power between slave states and free states.
C. ensure that slavery would die out gradually within a few decades.
D. pressure Missouri to join the country as a free state.

The Missouri Compromise aimed to balance power between slave states and free states by admitting Missouri as a slave state and Maine as a free state, along with the Thomas Proviso to restrict slavery expansion.

Explanation:

The main goal of the Missouri Compromise was to maintain a balance of power between slave states and free states. The compromise brought Missouri in as a slave state and Maine in as a free state. It also established the Thomas Proviso which banned slavery north of the southern boundary of Missouri.

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