Concept:Points outside the production possibility curve cannot be achieved with the available resources and technology.
Explanation:The production possibility curve shows the maximum output combinations an economy can produce.
Points on the curve indicate efficient and attainable production.
Points inside the curve are attainable but show inefficient use of resources.
Points outside the curve lie beyond the economy’s current productive capacity.
So, they indicate production levels that are impossible to reach, not merely inefficient levels.
Answer:A. unattainable production levels.