Which of the following was a balance that prevent major civil unrest in the united states in the first part of the 1800s?

a balance of southern and northern votes in the senate
a balance between the number of states where slavery was allowed and where it was outlawed
a balance between the desires of new territories and the original colonies
a balance between industrial iron production and cotton production

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A balance between the number of states where slavery was allowed and where it was outlawed.

Explanation:

This is the main reason why the United States was able to avoid major civil unrest during the first years of the 1800s. During these years, the country contained twenty-two states, and these were evenly divided between free and slave states. This ensured that the balance of power in the country was maintained. The Missouri Compromise represented an effort to maintain this balance, as a slave state could only be accepted into the Union if a free state joined at the same time, and vice versa.

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