Pioneer settlers were sometimes pulled west because they wanted to make a better living. Others received letters from friends or family members who had moved west. These letters often told about a good life on the frontier. The biggest factor that pulled pioneers west was the opportunity to buy land.
Answer:
I think the right answer is c
Explanation:
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"<span>Slavery was abolished in the United States" has nothing to do with the Dredd Scott case, which instead said that blacks had no standing in court because they were not citizens. </span>