What is the BEST policy for securing data on mobile universal serial bus (USB) drives?

A.
Authentication

B.
Encryption

C.
Prohibit employees from copying data to USB devices

D.
Limit the use of USB devices

Explanation:
Encryption provides the most effective protection of data on mobile devices. Authentication on its own is not very secure. Prohibiting employees from copying data to USB devices and limiting the use of USB devices are after the fact.