You have a server that runs Windows Server 2008 Service Pack 2 （SP2）. You plan to install Exchange Server 2010 on the server. You need to install the Exchange Server 2010 prerequisites for the Mailbox， Client Access， and Hub Transport server roles.  What should you do on the server（）？ 

• A、¡¤Install Microsoft .NET Framework 3.5 Service Pack 1 （SP1Install Windows Management Framework run ServerManagerCmd.exe IP Exchange-Typical.xml
• B、¡¤Install Microsoft .NET Framework 3.5 Service Pack 1 （SP1Install Windows Remote Management （winRM） 2.0 Run ServerManagerCmd.exe IP Exchange-Base.xml
• C、¡¤Install Windows ManagementFramework Install Message Queuing Install the Web Server role
• D、 ¡¤Install Windows Management Framewor Install the Web Server role Install the RPC over HTTP proxy component