Answer:
A
Step-by-step explanation:
Agriculture was the main occupation of people in the Union during the Civil War.
Sources:
-Fite, Social and industrial conditions in the North during the Civil War, (1910) pp 1–23; Paludan, A People's Contest" pp 159–69
-Grimsley, Mark. The Hard Hand of War: Union Military Policy Toward Southern Civilians, 1861–1865. Cambridge, UK: Cambridge University Press, 1995.