What is the best interpretation of this poster?

a. grow your own food.
b. send your extra food to the soldiers.
c. weapons are paid for with food sales.
d. only use the amount of food needed.

The correct answer is:

D. Only use the amount of food needed.

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.