-The Production Possibilities Frontier in Figure 1

Multiple Choice

-The production possibilities frontier in Figure 1.1 is concave to the origin because:

A) resources are equally substitutable between the production of food and films.
B) society can have more food only if it produces more films.
C) the cost of food in terms of films is constant.
D) the opportunity cost of food in terms of films increases are more films are produced.