3. What did the Missouri Compromise authorize the people of the Missouri territory to do?
A. vote on becoming a state
B. form a state government
C. vote on allowing slavery
D. decide the size of their state

C

Explanation:

In an effort to preserve the balance of power in Congress between slave and free states, the Missouri Compromise was passed in 1820 admitting Missouri as a slave state and Maine as a free state. In 1854, the Missouri Compromise was repealed by the Kansas-Nebraska Act.

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porter is writing economic history because he is focusing on the cost of developing vaccines.