The correct response is:
The level of unemployment has no effect on the production possibilities curve, so there would be no change to the production possibilities curve.
Explanation: While an increase in unemployment indicates that not all resources (including labor) are being used efficiently, it does not change the economy's production capabilities represented by the production possibilities curve (PPC). The PPC reflects the maximum possible production of two goods when resources are fully and efficiently employed; an increase in unemployment represents an inefficiency that leads to production being inside the curve, but does not shift the curve itself.