You recently upgraded all Windows NT Workstation 4.0 computers to Windows 2000 Professional. You want to give a new employee named Maria the ability to back up files, share resources, and install programs on a client computer that she shares with other users. You do not want Maria to be able to read other users’ files.   What should you do to accomplish these goals?（）

• A、Add Maria’s user account to the system group.
• B、Add Maria’s user account to the interactive group.
• C、Add Maria’s user account to the power user group.
• D、Add Maria’s user account to the administrators group.
• E、Add Maria’s user account to the Backup Operators group.