Conservation of Energy is the principle stating… A.
that energy can not be destroyed nor created.

B.
that thermal energy always equals kinetic energy.

C.
that an object’s energy is always the same.

D.
that no two objects can have exactly the same amount of energy.

Select an answer

A

Explanation:

because The law of conservation of energy, also known as the first law of thermodynamics, states that the energy of a closed system must remain constant—it can neither increase nor decrease without interference from outside

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.