Because metallic mirrors absorb some light, they waste energy. When light strikes a metallic mirror, electrons in the mirror move, using energy and dimming the reflected image. As a result, metallic mirrors cannot be used in applications in which minimizing energy loss is important, such as high-powered lasers. Which one of the following most accurately expresses the argument's main conclusion?
A: Part of the light falling on metallic mirrors tends to be absorbed by them.
B: Metallic mirrors are unsuitable for applications where it is crucial to minimize energy loss.
C: High-powered lasers require mirrors that conserve energy.
D: Metallic mirrors reduce the effectiveness of high-powered lasers.
Choose A, B, C or D as your solution.
B