Answer:
C. Can be produced only if there is less production of other products.
Step-by-step explanation:
When a nation's human and material resources are fully employed, then there has to be less production of other products because resources would have to be shifted away from such production and concentrated im producing more of any one item or product.
The above shows a scenario where economizing problem is in force i.e scarcity, which requires proper allocation of resources. It is a major problem faced by many societies and must be solved when there is less production of other products inorder to produce more of any one product.