Answer: C

The best protection for confidential data stored on a laptop is data encryption. Data, if not encrypted, would be accessible to anyone who has access to the disks. Logon ID and password are not the best protection because a stand-alone laptop, depending on the operating system, may not need an ID and password to begin a session, and it is relatively easy to bypass security controls on laptops to gain access to the operating system. Physical locks prevent physical theft only.   _{Your Comment}