Answer:
He was the first American to enter California from the east and return from it by an overland route. He was also a trader and explorer
The correct answer is: D) American farms and factories raised production levels.
Countries were able to buy US goods as a result of the economic stimulation of Europe which caused US farms and factories to ramp up production.
Slavery was given to them, they bought their rights and they felt like that was justification for buying blacks.
