Acertificate sold to citizens by a government in order to pay for a war. war effort trenches war bond propaganda

d) the constitution rights of native americans and their right to self-government on reservations

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.