Which of the following can a security administrator implement on mobile devices that will help
prevent unwanted people from viewing the data if the device is left unattended?

A.
Screen lock

B.
Voice encryption

C.
GPS tracking

D.
Device encryption

Explanation:
Screen-lock is a security feature that requires the user to enter a PIN or a password after a short
period of inactivity before they can access the system again. This feature ensures that if your
device is left unattended or is lost or stolen, it will be difficult for anyone else to access your data
or applications.