Answer:
- Expansion of slavery in the South.
- Development of southern railroads.
- Industrialization of the North.
Step-by-step explanation:
These are all factors that led to a division of beliefs in the United States following the American Revolution. As plantations became more common, slavery expanded in the South. Moreover, the development of Southern railroads connected many areas that had different cultures and different interests. Finally, the industrialization of the North increased the differences between this area and the rest of the country.