Which of the following items describes the function of an inverter module used in a laptop?

The backlight requires AC, not DC, so supplying DC directly would not illuminate a CCFL tube and does not describe the inverter's function.

LEDs require DC, not AC, and the inverter is not associated with LED panels; this also incorrectly names the output type.

Converting AC to DC describes a rectifier or power adapter, not an inverter; the inverter does the opposite conversion inside the laptop.

CCFL (Cold Cathode Fluorescent Lamp) backlights require alternating current to operate, but a laptop's internal power supply produces direct current. The inverter module performs the DC-to-AC conversion, stepping the voltage up to the level needed to illuminate the fluorescent tube behind the LCD panel.