productivity may best be defined as\na the quantity of production.\nb the amount of revenue earned.\nc the…

Brief Explanations:

Productivity measures how efficiently inputs (like labor, capital) are used to generate outputs. It is calculated as the ratio of outputs to inputs. Quantity of production only considers output volume, revenue is about financial gain, and quality of production is about product - standard, none of which fully define productivity like the ratio of outputs to inputs does.

Answer:

C. the ratio of outputs to inputs