Answer: Slavery in the Western Territories. To many nineteenth century Americans, the expansion of slavery into Western territories caused a great deal of controversy. ... The federal government, hoping to prevent a civil war, temporarily resolved the issue with compromises.
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Answer: B.) The return of Mexican lands held by the United States.
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Answer:
Because their rulers have changed over the centuries, hereby changing opinions and laws
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Marco Polo found a new trade route (possibly several) that expanded trade in Europe.
