An outward shift of a nation's production possibilities frontier can occur due to

A) a reduction in unemployment.

B) a natural disaster like a hurricane or bad earthquake.

C) a change in the amounts of one good desired.

D) an increase in the labor force.

The correct answer is option D.

Explanation:

Production possibility frontier shows the different amounts of two goods that can be produced using fixed resources.

An outward shift in the production possibility frontier imply that production of output is increasing.

Production may increase because of increase in inputs.

Here, the shift in production is happening because of increase in labor force.