A technician, Anne, notices there are no hardware volume control buttons on the new laptops that were ordered. Which of the following would control the volume on the laptop?

While software controls like the OS volume mixer exist, function keys are the direct hardware-level control mechanism on the laptop itself and are not software-only.

Bluetooth is a short-range wireless communication protocol for peripherals such as headsets and speakers and does not control the laptop's own volume.

Laptop keyboards include an Fn (Function) key that activates secondary functions printed on the F1-F12 keys, commonly including volume up, volume down, and mute controls. This is a hardware-level keyboard shortcut handled by the embedded controller and works even before the OS fully loads, making it the primary method for volume control when physical dedicated buttons are absent.

A WiFi switch enables or disables the wireless networking adapter and has no relationship to audio volume control.