The first alternative is correct (A).
The Cold War opposed two powers aimed at dominating the world economic system. The US aimed at developing capitalism and expanding the democratic system, while the Soviet Union aimed to implement the communist system. Communist systems are characterized by state control of the means of production, so that usually only one party controls each communist country.
The aftermath of the Civil War was exhilarating, hopeful and violent. Four million newly freed African Americans faced the future of previously-unknown freedom from the old plantation system, with few rights or protections, and surrounded by a war-weary and intensely resistant white population.
The court house. I believe
B. Because farming still had a lot of labor and C doesn’t make sense.
Union soldiers were fighting for the freedom of slaves and reuniting the states. Confederate soldiers fought for protecting the confederacy. Yes, it did change over the war.