A compact fluorescent lightbulb uses less energy than an incandescent lightbulb to produce the same amount of light. Which statement must be true?
A. The incandescent bulb is more energy efficient than the compact fluorescent bulb.
B. You cannot compare the energy efficiencies of the two lightbulbs with the given information.
C. The compact fluorescent bulb is more energy efficient than the incandescent bulb
D. The two lightbulbs have the sarne energy efficiency but differ in energy conservation