-If the Farmer Is Producing 5000 Bushels of Soybeans at Point

-If the farmer is producing 5000 bushels of soybeans at point "b" in the above figure, we know that

A) the farmer is not using his resources efficiently.
B) the farmer is using his land to produce a crop other than soybeans or corn.
C) the farmer must be using more land than was used in constructing the production possibilities curve.
D) the farmer is using his resources efficiently.