You work as a network Exchange administrator at Company.com.The Company.com network currently consists of a single Active Directory forest containing a single domain named Company.com.The Company.com organization makes use of Microsoft Exchange Server 2008 Service Pack 2 （SP2） as their messaging solution.During the course of the business week you receive instruction from Company.com to plan the installation of Microsoft Exchange Server 2010 whilst ensuring you install the Microsoft Exchange Server 2010 prerequisites for the Mailbox， Hub Transport and Client Access server roles. What should you do？（）

• A、You should consider having Windows Management Framework installed.You should have Message Queuing installed before installing the Web Server role.
• B、You should consider having Windows Management Framework installed.You should then have the Web Server role installed before installing the RPC over HTTP Proxy component.
• C、You should consider having Microsoft .NET Framework 3.5 Service Pack 1 （SP1） installed. You should then have Install Windows Management Framework installed and run the ServerManagerCmd.exe -IP Exchange-Typical.xml command.
• D、You should consider having Microsoft .NET Framework 3.5 Service Pack 1 （SP1） installed. You should then have Windows Remote Management （WinRM） 2.0 installed and run the ServerManagerCmd.exe -IP Exchange-Base.xml command.