Which statement describes the motion of a mass on a spring? A. It exhibits constant velocity motion. B. It exhibits simple harmonic motion. C. It exhibits circular motion. D. It exhibits only upward motion.

The statement that describes the motion of a mass on a spring would be: It exhibits constant velocity motion. The motion in mass of the spring will follow the basic Hooke's law which stated that the stress/force of an elastic object like spring will be proportional to the stress applied to it.