Concept:Optimum population refers to the number of people that makes the best use of existing resources to achieve the highest possible standard of living.
Explanation:The features of an optimum population include full employment of all available resources.
It also includes maximum per capita production and income because output per person is at its highest.
A high standard of living is always present because the optimum population ensures the best balance between population and available resources.
However, the optimum population does not require unlimited or unexploited resources.
Resources are always limited and scarce, and an optimum population makes full use of them rather than leaving them unlimited or unexploited.
Therefore, unlimited amount of unexploited resources is not a feature of optimum population.
Answer:B. unlimited amount of unexploited resources