What are the political issues caused the most division in washington?

The question is not complete. See below the complete question.

which of these political issues caused the most division in Washington, DC, as the United States moved westward in the 19th century?

A.) the role of men in the new frontier

B.) the role the geography played in state lines

C.) the expansion of slavery into newly acquired territories

D.) whether or not to allow Native Americans to become US citizens

The correct answer is C. The expansion of slavery into newly acquired territories.

Explanation:

the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism

b. they tried to evict the squatters from the area.

so sorry if wrong