Answer: D
Explanation:
Sectionalism was a time when Northerners and Southerners favored and did things for their country's region rather than the nation as a whole. The dispute with State's Rights was that the Southern (slave) states thought they could secede (separate) from the country when it stopped working for them after Abraham Lincoln (against slavery) won the election. Slavery was a huge problem because there were many that were for and against it.