The American Civil War (1861–1865) drastically changed the American political landscape. Here's why governments (D) is the right response:
Public opinion (A): Although it was important to the Civil War, public opinion didn't call for a total revolution. Though there were differences in public opinion on many subjects in the North and the South, the war did not significantly change the public feeling like a "complete revolution" would suggest.
Economies (B): The Civil War had a major effect on the economies of both the North and the South. The Northern economy, which was more industrialized, was both stretched and encouraged by wartime output, while the Southern economy, which was dependent on agriculture and slavery, was destroyed.
Education (C): The Civil War had an impact on education systems, especially in the South when infrastructure collapsed and resources were depleted. But neither the North Nor the South's educational systems saw a "complete revolution" as a result of the war.
Governments (D): Both the North and South's governments underwent a significant transition as a result of the Civil War. A revolutionary move against the federal government was the Southern states' attempt to separate and create the Confederate States of America. Slavery was abolished as a result of the Confederacy's defeat, and the Reconstruction era saw substantial changes to the governments of the Southern states.
