Assuming the datum/reference for measuring gravitational potential energy is at the point A? Which of the following are zero as the block moves? Select all that apply. KE = Kinetic Energy PE = Potential Energy O KE at A O KE at B O KE at C OPE at A due to gravity PE at B due to gravity PE at C due to gravity PE at A due to spring OPE at B due to spring O PE at C due to spring