Identify the choice that best completes the statement or answers the question. The purpose of a car engine is to transform the chemical energy of gasoline into kinetic energy of the car in motion. Gasoline is burned in the engine to create that movement. However, gasoline engines are typically only about 20% efficient. What happens to the rest of the energy released from the burning gasoline?

a. Most of it is destroyed by the process of the gasoline burning.

b. Most of it is changed through chemical reaction to a type of nuclear energy.

c. Most of it is transformed by the engine into electrical energy.

d. Most of it is transferred to the environment in the form of heat.