This question is based on the interpretation of the first law of thermodynamics.
Which is true according to the law of conservation of energy?
A. In a closed system, the total amount of energy in the universe keeps on changing.
B. The supply of energy is limited, so it is essential to conserve it.
C. In a closed system, energy can be created and destroyed.
D. In a closed system, energy cannot be used faster than it is created.
E. In a closed system, the total energy always remains constant.
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