When energy is transferred from one part of a system to another, some of the energy is lost during the transfer and cannot be used as it was intended.
Which two sentences describe examples of this?

A. An electric motor heats up as it powers a blender.
B. Wind moves a turbine, generating electricity.
C. Friction between the moving parts of an airplane engine warms
thd'arts as the engine burns fuel.
D. Sunlight strikes a solar panel, generating electricity.
E. Stereo speakers emit sound when powered by electrical energy.