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 beingforgotten.
• 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.