Answer is A. The French and Native Americans were pushed further west into Oregon Territory.
Sectionalism. Sectionalism is loyalty to one's own region or section of the country, rather than to the country as a whole.
In 1859 50% of the nations wealth, stocks, bonds, land, cash was in slaves owned by southerners. They lost everything. The north pay less on the south slavery was not finish and they where trying to go to the north for better jobs and freedom the south had force slaves to work.
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