What should be part of a comprehensive network security plan（）。

• A、Allow users to develop their own approach to network security
• B、Physically secure network equipment from potential access by unauthorized individuals
• C、Encourage users to use personal information in their passwords to minimize the likelihood of passwords being forgotten
• D、Delay deployment of software patches and updates until their effect on end-user equipment is well known and widely reported
• E、Minimize network overhead by deactivating automatic antivirus client updates