Answer:
Option B.
Step-by-step explanation:
Quantity of output per unit of input, is the right answers.
Productivity explains multiple standards of the performance of the production. Usually, a productivity ratio is manifested as the ratio of aggregate output to a particular input or a total input employed in the process of production. For instance, production per unit of input, generally over a particular time period. In short, it is the ratio between the output of a commodity and an amount of input used in the production of that commodity.