Which two device classes should you include?

You are developing a fitness app for distribution through the Windows Store.
The app must interact with the following USB device classes:
• Webcam
• Infrared thermometer
• Scale
• Printer
You need to modify the app manifest file as required to support the devices.
Which two device classes should you include? Each correct answer presents part of the
solution.

A.
AudioVideo

B.
IrDa