01 What can a QR code be used for?
Answer and explanation
Correct answer: D. Opening digital information or a payment service by scanning
Explanation: A QR code is a machine-readable pattern that can be scanned with a camera or QR reader. The scan may open a web page, display information, identify an item or lead to a payment service, depending on how the code was created. It does not cut paper, increase sound or clean a screen, so D is correct.