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.