What is true about the energy in the system below?

A) the potential energy is the lowest at point B because the distance between the swing, and the earth is the lowest at this point
B) the potential energy is greatest at point A and C because the farther the swing moves away from earth, the greater the potential energy is
C) potential energy is stored by an object because of its position relative to another object
D) as the children moved from .8 to point B kinetic energy is increasing
E) all of these are true
F) all of these are false

E) all of these are true