The correct answer would be alternative A) Civil War
Sectionalism is the idea of prioritizing one region or area of a country rather than the country as a whole.
In simple words, that means that people from certain areas of a country feel like they're more important than others, and prioritize things that help that specific region rather than things that could happen the whole country.
This was a problem during the Civil War between the North and the South of the United States, each side thinking that their way of living was better than their counterpart's. This led to conflict, which led to war.
