Wassim Masood Works in the Information Technology Department of TMV

Wassim Masood works in the information technology department of TMV.On Monday morning,he arrived at work,scanned his identity card,and entered his code.At that moment,a lady in a delivery uniform came up behind Wassim with a bunch of boxes.Although Wassim held the door for the delivery lade,he later wondered if the delivery lady was engaged in

A) pretexting.
B) piggybacking.
C) posing.
D) spoofing.