what technology is being used when you are sent an email saying you can track your package?\na. scan…

what technology is being used when you are sent an email saying you can track your package?\na. scan code\nb. lms\nc. cam\nd. m2m
Answer
Brief Explanations:
When you are sent an email to track a package, scan - code technology is commonly used. Barcodes or QR - codes on packages are scanned at various points in the delivery process, and this information is used to update the package's location and status which is then communicated to the recipient via email. LMS (Learning Management System) is for educational purposes, CAM (Computer - Aided Manufacturing) is related to manufacturing processes, and M2M (Machine - to - Machine) is a general concept of communication between devices but not the main technology for package tracking in this context.
Answer:
A. Scan code