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?（）
- AAdd Maria’s user account to the system group.
- BAdd Maria’s user account to the interactive group.
- CAdd Maria’s user account to the power user group.
- DAdd Maria’s user account to the administrators group.
- EAdd Maria’s user account to the Backup Operators group.