Answer:
A. Americans became more aware of social inequalities.
Explanation:
America was actually poorer as a nation after the Civil War, and after slavery, the model used did not reflect that used by Europeans at the time. The North and South continued to have political and economic disagreements after the Civil War.
What DID happen was that Americans everywhere were becoming more and more aware of social inequalities, with having slaves, the treatment of the mentally ill, the conditions of those in poverty, etc.
