If a variable input is added to some fixed input,beyond some point the resulting extra output will decline.This statement describes:

A) economies and diseconomies of scale.
B) X-inefficiency.
C) the law of diminishing returns.
D) the law of diminishing marginal utility.

Law of Diminishing Returns

An economic principle stating that as investment in a particular area increases, the rate of profit from that investment, after a certain point, cannot continue to increase if other variables remain constant.

Extra Output

The additional production that is generated as a result of adding more of a variable input, such as labor or capital.