Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). The domain contains two domain controllers named DC1 and DC2. DC1 is located in Montreal and DC2 is located in Seattle. Each domain controller has a dedicated hard disk that contains only the Active Directory database and log files. Each night, you back up the system state on all domain controllers. On DC2, the hard disk that contains Active Directory fails. You replace the failed hard disk on DC2. You need to restore domain controller functionality on DC2. The solution must minimize replication traffic between Montreal and Seattle. What should you do on DC2? （）

A. Uninstall Active Directory and then reinstall ActiveDirectory.
B. Start by using the Last Known Good Configuration.
C. Start in Directory Services Restore Mode and restore the NTDdit file.
D. Start in Directory Services Restore Mode and restore the system state.