You have an Exchange Server 2010 Mailbox server.The server is a member of a database availability group （DAG）.The server fails.You install the operating system on a new server and use the same computer name.You join the server to the domain.You need to reinstall Exchange Server 2010 on the server.The solution must ensure that previous Exchange server configurations are applied to the new server.What should you do？（）

• A、Run setup /RecoverCMS
• B、Run setup /m：RecoverServer
• C、Restore the system state from the previous server
• D、Install the Exchange management tools and then run the Restore-Computer cmdlet