Answer:
Option D.
Step-by-step explanation:
Sectionalism was reduced, is the right answer.
The Missouri Compromise was a law which was enacted to keep a balance of power between South and North in the Senate of the United States. The main motive of this Compromise was to maintain an equilibrium between the number of free and slave states in the Union. During this time, Missouri entered the Union as a slave state and Maine joined as a free state in the union. Since both the free and slave states entered the union, extremists in both the North and South were not satisfied with this compromise. Accordingly, the correct option will be option D, that the Missouri Compromise reduced sectionalism.