The authors of the US Constitution included which two features as ways to limit the power of any one person in the government? The president, a civilian, is the Commander in Chief of the military.
Powers are shared across three branches of government.
Congress has powers that individual states do not have.
Leaders are identified by the people, rather than by divine birthright.
Citirens have the right to file grievances with their government.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

this means that germany had to pay the allied countries. reparations are/is essentially payment for something that they have done wrong, so after ww1, germany was forced to pay reparations so they could replenish the allied countries resources' that they had lost during the war.