a ball is falling after rolling off a tall roof. the ball has\na kinetic energy only.\nb potential energy…

Brief Explanations:

Kinetic energy is the energy of motion. Since the ball is falling (in motion), it has kinetic energy. Potential energy is related to an object's position in a gravitational field. As the ball is still at a certain height above the ground while falling, it also has potential energy.

Answer:

C. both kinetic and potential energy.