The Figure Given Below Represents the PPC in Two Nations

The figure given below represents the PPC in two nations - Germany and Korea, producing only two goods, cars and food.Figure 2.4

-The term barter refers to exchanges made:

A) only with the use of money.
B) without the use of money.
C) outside the U.S. economy.
D) only in underdeveloped countries.
E) within countries in a monetary union.