Answer:
D. Velocity
Step-by-step explanation:
Energy Dimensional Analysis
The kinetic energy (K) can be calculated by the formula:

Where:
m = mass of the object
v = speed at which the object moves
Solving for v:

Or, equivalently:

In dimensional terms, the quotient of the square roots of the energy and the mass is equivalent to the dimensions of the velocity (or speed),
D. Velocity