Why was the Missouri Compromise created?

The major differences between the North and the South caused sectionalism in the United States, leading to compromise between the regions.
The major differences between the East and the West caused sectionalism in the United States, leading to compromise between the regions.
The major differences in beliefs between the branches of government caused sectionalism, forcing the legislative branch and executive branch to make a compromise.
The major differences between the cities and the countryside caused sectionalism in the United States, leading to compromise between the regions.