Which of these best describes the difference between a closed and open system and the total energy in the system.
A) Since energy is always conserved, the total energy in both systems remains the same.
B) In a closed system the amount of energy remains the same. In an open system, energy is always released.
C) In a closed system the amount of energy remains the same. In an open system, energy is always absorbed.
D) In a closed system the amount of energy remains the same. In an open system, work is either done on or by the system changing the energy of the system.