Answer:
C. C
Step-by-step explanation:
The ball will have its greatest kinetic energy just before it touches the ground which is at point C.
Kinetic energy of a body is the energy due to the motion of the body. As a body moves and its speed increases as a result of acceleration, then the kinetic energy will increase more.
As the body starts from rest, at point A, through B and C, the velocity increases drastically due the pull of the earth.
So, point C will show the greatest velocity and hence the most kinetic energy by the body.