Why did the North agree to the Missouri Compromise? A. It allowed Maine to enter the Union as a free state.
B. It repealed the Fugitive Slave law.
C. It allowed California to enter the Union as a free state.
D. It banned slavery in the Northwest Territory.

A. It allowed Maine to enter the Union as a free state.

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.

i think it's a)sparta