I think that the answer is C. Hope this helps
Checks and balances is the answer to this question.
Monroe Doctrine. The Monroe Doctrine was first set out in a speech by President James Monroe on December 2, 1823. The ideas are grounded in much earlier thinking, such as the "Farewell Address" of George Washington, in which he inveyed against close political association with European states, and in the first inaugural address of Thomas Jefferson.
C. To protect travelers on the Silk Road
Explanation:
according to me it's mehmed II