E7B02 — Amateur Extra Class

E7B02 : What is a Class D amplifier?
A An amplifier that uses switching technology to achieve high efficiency
B A low power amplifier that uses a differential amplifier for improved linearity
C An amplifier that uses drift-mode FETs for high efficiency
D An amplifier biased to be relatively free from distortion
Correct Answer: An amplifier that uses switching technology to achieve high efficiency