Answer:
epoch during the first 100 years of United States history where the economy progressed from manual labor and farm labor to a greater degree of industrialization based on labor.
Explanation:
The Monroe Doctrine's main purpose was to "<span>D. to warn European nations not to form new colonies in the Americas". It was a declaration of true sovereignty in the US. </span>
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They became drastically different culturally and geographically. As the colonies came up with traditions for self-government like the House of Burgesses and the Mayflower Compact, the colonies became like a separate entity. The British practiced salutary neglect, leaving the colonies alone for the most part, until 1754, the end of the French and Indian War. I hope this helped.