What is the meaning of opportunity cost? Give an example of this concept

the loss of other alternatives when one alternative is chosen

1. they could both use a veto to cancel an action.

2. women couldn't vote in the roman republic but could in the united states

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.