Which of the following BEST describes the purpose of an inverter in a laptop?

A.
Allow for more than two USB devices to access power

B.
Convert direct current to alternating current

C.
Rotate the image to properly align it with the user

D.
Provide power to the backlight of the screen

Explanation:

http://www.wisegeek.com/what-is-a-laptop-inverter.htm