You are a network administrator for ExamSheet.net’s Windows 2000 network. You purchase 25 new portable computers that have a preinstalled version of Windows 98. You upgrade the 25 new computers to Windows 2000 Professional. You use the Advanced tab of the Taskbar & Start Menu dialog box to turn off the Logoff option from the Start menu. A week later many of the portable computers have been configured by their users to display the Logoff option again. You want to reconfigure the portable computers so that the users cannot use the Taskbar & Start Menu dialog box to restore the Logoff option the Start menu. What should you do？（）

• A、On theAdvancedtab of theTaskbar & Start Menudialog box， highlight theDisplay Log Offoptionand selectRemove.
• B、On theAdvancedtab of theTaskbar & Start Menudialog box， clear theAdministrative Toolsoption.
• C、On theGeneraltab of theTaskbar & Start Menudialog box， clear thePersonalized Menus option.   Log off and then log on to the computers.
• D、Use a Local Computer Policy to disableLogoffon the Start menu.
• E、Use theUser Profilestab within the properties of My Computer to change the profile from the  local profile to a roaming user profile.