What is the Law of Diminishing Returns?

A. It is a law of economics that states all process cannot be improved infinitely.

B. It is a law of economics that states if one area of profitability increases, the other areas of an organization must increase also to produce higher profits.

C. It is a law of economics that states if one area of production is increased while other factors remain constant, the overall returns will eventually increase as well.

D. It is a law of economics that states if one area of production is increased while other factors remain constant, the overall returns will eventually diminish.