> Which one is the best explanation of energy ?

Which one is the best explanation of energy ?

Posted at: 2015-05-24 
A) Making transformations

B) The ability to do work

C) Conservation of power

D) Measuring joules

I think its b

a

It's B

E

A) Making transformations

B) The ability to do work

C) Conservation of power

D) Measuring joules