Answer:
Sectionalism was the major cause of the United States Civil War because it was integral to creating the Southern social life as well as shaping its political tendencies, not the issue of slavery, which only affected a very small percent of southerners.
Explanation:
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A country's population can decline with low birthrates and high death rates, but another factor that causes a country's population to decline is emigration. Emigration is the act of leaving the native country to settle in another!
It could either be a or b i am not for sure
i think it might be B
