Which of the following is the main purpose of the +5VSB output of a power supply?

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Which of the following is the main purpose of the +5VSB output of a power supply?
A . It allows peripherals to draw power when the machine is off
B . It provides power to the audio and sound boards of the machine
C . It acts as the main voltage supply to the motherboard and processor
D . It powers all expansion cards and external device hubs

Answer: A