Why did Missouri's request to join the United States in 1820 cause a crisis? A. Northern states were upset that Missouri wanted to join as a slave
state.
B. Northern states did not want to accept the Fugitive Slave Act.
C. Southern states worried they would lose power in Congress if
Missouri became a state.
D. Southern states were upset that Missouri wanted to join as a free
state.

A

Explanation:

A

Explanation:

Missouri is infamous for trying to join the Union as a slave state, even though slavery was prohibited (banned) within the Union, which were free states.

This led into the Missouri Compromise, where Missouri was eventually admitted as a slave state in exchange for legislation that banned slavery above 36°30' parallel, except for Missouri.

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