From the end of the Civil War to the turn of the century corporations grew in size and power.
The end of the Civil war to the turn of the century the value of manufactures increased drastically.
This may be attributed to the fact that many farmers who have the zeal for farming began to make use of the new agricultural practice to cultivate in order to increase farm output.
A is wrong because we became democratic, not communist C is wrong because there wasn't a South America. D is wrong because it was pretty violent with all the battles being fought and all.