30 points ….Which of the following statements best summarizes the law of conservation
of energy before and after a change in a system?
OA. The sum of the potential energy before and after the change
equals the sum of the kinetic energy before and after the change.
O B. The potential energy is the same before and after the change, and
the kinetic energy is the same before and after the change.
C. The potential energy equals the kinetic energy before the change
and after the change.
D. The sum of the potential energy and the kinetic energy before the
change equals the sum of the potential energy and the kinetic
energy after the change.