Articles I, II, and III of the US Constitution reflect Montesquieu’s concept of the . The articles also reflect the Enlightenment ideal that lies with the people.

Montesquieu’s concept is separation of powers: Articles I, II, and III establish the legislative, executive, and judicial branches, respectively. The articles also reflect the Enlightenment ideal of popular sovereignty—that government’s authority comes from the people. So the correct choice is “separation of powers.”

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