____ is the measurement of how much work is accomplished in a specific amount of time, with time being the differentiating focus.

A) Power
B) Torque
C) Work
D) Energy

Power is defined as the rate at which work is done, or the amount of work done per unit of time. Torque is the rotational equivalent of force and is not directly related to time. Work is the measure of energy required to move an object over a certain distance, and energy is the ability to do work. Therefore, the correct choice is A, power.