You are the network administrator for The network consists of a single Active Directory domain named All network servers run Windows Server 2003. The domain contains three domain controllers: DC1, DC2, and DC3. Each one hosts user data. DC1 experiences hard disk failure. You need to temporary restore the user data to DC2. Which type of restoration should you perform?（）

• A、Automated System Recovery (ASR)
• B、Normal
• C、Primary
• D、Authoritative