How Is Most of the Stored Chemical Energy in Fuel

Multiple Choice

How is most of the stored chemical energy in fuel sources currently utilized?

A) It is converted to heat energy and then kinetic energy and then into electrical energy.
B) It is converted into electrical energy directly.
C) It is converted to kinetic energy and then heat energy and then into electrical energy.
D) It is converted into electrical energy and then kinetic energy.
E) none of the above