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 Users group.
- DAdd Maria’s user account to the Administrators group.
- EAdd Maria’s user account to the Backup Operators group.