Final answer:
The variables a, b, and c represent a) acceleration, velocity, and displacement respectively.
Step-by-step explanation:
The variables a, b, and c in the equation of motion represent acceleration, velocity, and displacement respectively.
Acceleration (a) measures the rate of change of velocity with respect to time. Velocity (b) measures the rate of change of displacement with respect to time. Displacement (c) measures the change in position from an initial position.
Therefore, the correct answer is option a) Acceleration, velocity, and displacement.