Answer:
The rich were literally on the riding backs of the poor, oppressing them and making them serve the rich.
The correct answer is Cotton.
Texas was a great area for cotton because of the vast amounts of land that were farmed and because of the amazing climate. They also had slaves so they could have them work on those farms and produce cotton which was the main thing in their economy.
An economic slump due to the government over spendings in Vietnam
I believe that would be C
Vietnam: gained is independence on September 2, 1946