During the Civil War, the North Differed from the South

During the Civil War, the North differed from the South in which of the following economic respects?

A) Agricultural production increased in the South; Northern agricultural production plummeted.
B) The South became poorer; the North remained prosperous.
C) The South's industry expanded a little; all Northern industries experienced unprecedented growth.
D) The South experienced severe inflation; Northern prices remained stable.