The Monroe Doctrine granted the United States the ability to independently intervene in the trading economy. Having the ability to act alone and be neutral to war situations allowed them to make economic decisions based off of what they felt was best for them to prosper.
Answer:
B. The South became more dependent on slavery, deepening the differences between the South and the North.
Explanation:
Answer: sorry what are you trying to say!
Explanation: :)
Either they crossed over the land bridge following their food, or they were moving by means of water across the Bering strait