Refer to the Diagrams

Refer to the diagrams. Assume that only wheat can be grown on the three grades of land shown in Figures (a) , (b) , and (c) . Also assume that identical amounts of labor, capital, and other needed inputs are used in farming each grade of land. On the basis of these three figures, we

A) the land shown in both Figures (a) and (b) is a "free good."
B) the land shown in Figure (a) only is a "free good."
C) the land shown in all three figures is a "free good."
D) land is not a "free good" in any of the three figures.