If a country is currently Producing at a point inside its production possibilities curve, that implies that

B$)$ The current level of production is unattainable for this country, given the present level of technology.

It is feasible only when the country is at war but not feasible when the country is at peace.

A$)$ The country must be using its resources efficiently.

D$)$ We are forgoing the ability to produce more of both goods.