Hi my name is breanna imma cheerleader and i need on this.

a student drops a rubber ball onto a surface. assume that this is a closed system. the ball bounces, nut each successive bounce is shorter than the one before it.
eventually, the ball comes to a stop. which statement provides evidence that supports the idea that energy is conserved in this closed system?

a. the ball moves through air, suggesting that the ball has mechanical energy.
b. the ball needs a push or pull to start moving, suggesting it needs a constant input of energy.
c. the ball bounces many times, suggesting the energy is used up efficiently.
d. the ball makes a sound with each bounce, suggesting that soem kinetic energy transformed into sound.