President Harry S. Truman established that the United States would provide political, military and economic assistance to all democratic nations under threat from external or internal authoritarian forces.
The factor that helped both areas become so socially diverse, technologically advanced and wealthy was their central location. From their shores or land borders they could easily reach almost any country in the AfroEurasian continents. Also India, and somewhat China were very interested in outside cultures and embraced them with open arms.
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Some of them ran to Florida in search of freedom.
Answer: A
Reason John C. Calhoun was a Vice President & the rest where leaders in abolitionism