Answer:
Between 1800 and 1850 the United States had massive population growth. The population went from 5,000,000 to 23,000,000 in 50 years. Many people were searching for a way to make a living and the idea that there was free or low-cost farmland in the west pulled many people to the west.
Explanation:
Sample Answer
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It would be mainly that "<span>D. More than one person wishes to control the same piece of land" that generally </span>has been the main cause of land grant disputes over time, since land is of course limited and very valuable.
The primary difference between barter and currency systems is that a currency system uses an agreed-upon form of paper or coin money as an exchange system rather than directly trading goods and services through bartering.
1 is the spread of slavery, but I'm not sure about 2
