Your company has a main office and a branch office. The network consists of a single Active Directory domain. All network servers run Windows Server 2003 ServicePack 2 (SP2). You deploy a server in the branch office that runs Windows Server 2003 SP2. You need to enable a user in the branch office to restore files on the branch office server. The solution must provide the minimum level of administrative permissions required for this task. What should you do?（）

A. Modify the user rights assignments in the default domain security policy.
B. Modify the user rights assignments in the local security policy on the branch office server.
C. Add the branch office administrator to the domain Backup Operators group.
D. Add the branch office administrator to the local Backup Operators group on the branch office server.