You have an Exchange Server 2010 Client Access server named CAS1.CAS1 fails.You install a new member server named CAS1 on the network.You need to recover the Client Access server role on CAS1.What should you do？（）

• A、Restore the Inetsrv folder and the system state from CAS1.
• B、Restore the Inetpub folder and the system state from CAS1.
• C、Run Setup /RecoverCMS from the Exchange Server installation source files
• D、Run Setup /M：RecoverServer from the Exchange Server installation source files