30) Which best describes the second law of thermodynamics? 

A) Some useful energy is lost as heat whenever an energy transfer

B) Energy is not created nor destroyed, but it can change from one energy form to another. occurs. 

C) Energy is not created nor destroyed, but it can change into matter. 

D) Energy can be created from matter or used to produce matter. 

E) Energy transfers are always 100% efficient in changing energy from one useful form to another.