I think it was the prevention of terrorism act, sorry if wrong.
"The main way in which the United States developed politically during this time was that the Republican Party formed as an anti-slavery platform, while economically the nation flourished due to the create of railroads."
Original answer from: HIstoryGuy
D) because if they didn't satisfy consumers, they'd lose them
We can get to places way faster and have actually scheduled times
Answer:
Abundant plant and animal life.
