You are the network administrator for TestKing. The network consists of a single Active Directory domain named testking.com. All domain controller run Windows Server 2003. employes three database administrators who administer seven databases servers that run Windows Server 2003. The database administrators occasionally restore a database server after a disaster. To restore a server, database administrators need the rights required to perform the following tasks: 1. Back up files and folders 2. Restore files and folders. 3. Restore the System State data. You need to assign the database administrators the rights that they require to perform the specified tasks. For security reasons, you must not assign the administrators more rights than they require to perform the tasks. What should you do?（）

Add the database administrators' user accounts to the Administrators group on each of the database servers.
B. Add the database administrators' user accounts to the Power Users group on each of the database servers.
C. Add the database administrators' user accounts to the Backup Operators group on each of the database servers.
D. Add the database administrators' user accounts to the Backup Operators group on one of the domain controllers.
E. Add the database administrators' user accounts to the Server Operators group on one of the domain controllers.