The crittenden compromise proposed gradually abolishing slavery in the south. allowing some slavery in northern states. allowing only certain states to secede from the union. using the missouri compromise to decide about slavery.

The correct answer is using the Missouri Compromise to decide about slavery.

In order to appease the Southern states who were threatening to secede after the election of Abraham Lincoln, John Crittendedn proposed a series of constitutional amendments regarding slavery. One of the most famous parts of his proposals was the idea of permanently keeping the 36'30 line, established in the Missouri Compromise, as the line that separates slave and free states. He wanted to make it so that any territory below this line would allow slavery and anything above this line would not allow slavery.