Sally rolled a marble down a ramp to investigate the potential energy and kinetic energy of a marble. She planned to measure the kinetic and potential energy at three different points but forgot to measure the kinetic energy at Point C. Kinetic Energy Potential Energy Point A 0 joules 14 joules Point B 6 joules 8 joules Point C ???? 2 joules Which BEST explains what she knows based on her investigation?