Which one of the statements is true?​

A) ​Diminishing returns is a long-run concept while decreasing returns to scale is a short-run concept.
B) Diminishing returns is a short-run concept while decreasing returns to scale is a long-run concept.
C) Diminishing returns is a both short and long-run concept while decreasing returns to scale is a short-run concept.
D) ​Diminishing returns is a long-run concept while decreasing returns to scale is a short and long-run concept.

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.

Decreasing Returns

A condition in economics where adding more input (like labor or capital) leads to progressively smaller increases in output.

Long-Run

A term referring to a period of time in economics during which all factors of production and costs are variable.