Answer :
Final answer:
The formation of the United States, founded on Enlightenment principles, allowed Europeans to see these philosophies put into practice, helping to further fuel the Enlightenment and inspire democratic revolutions throughout Europe.
Explanation:
The formation of the United States significantly contributed to the Enlightenment in Europe. The Enlightenment was a period of profound intellectual exchange that challenged traditional doctrines and government, leading to new philosophies about the individual and society.
The United States, founded on Enlightenment principles of democracy, liberty, and equal rights, provided a real-world example of these principles in action. Options B and D are the most valid. B: It allowed Europeans to see the philosophies they had been discussing put into practice - this demonstrates how the US Constitution was largely influenced by Enlightenment thought, particularly notions of individuals' rights and checks and balances in a government system. D: It produced leading philosophers who inspired the constitutions of many post-revolution European countries - for example, the works of American statesmen like Benjamin Franklin and Thomas Jefferson had great influence in Europe, inspiring ideas in the French Revolution and other democratic movements.
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