-The Figure Above Illustrates a Small Country's Production Possibilities Frontier

-The figure above illustrates a small country's production possibilities frontier.Based on the figure,we can tell that the nation's resources are

A) not equally productive in all tasks because the production possibilities frontier is bowed out.
B) unlimited because the slope is negative and the PPF is bowed out.
C) equally productive in all tasks because the slope is negative.
D) not equally productive in all tasks because the slope is negative.
E) equally productive in all tasks because the production possibilities frontier is bowed out.