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.