Which of the Following States the First Law of Thermodynamics

Multiple Choice

Which of the following states the First Law of Thermodynamics?

A) One usable form of energy can be completely converted into a more useable form.
B) One usable form of energy can be completely converted into another useable form.
C) Energy can be created and destroyed.
D) Energy cannot be created or destroyeD.
E) Energy cannot be transformed.