A.You should consider having the Setup.com /M:Install /R:HT command run from the command prompt.
B.You should consider having the ServerManagerCmd.exe -IP Exchange-HUB.xml command run from the command prompt.
C.You should consider having the Add-WindowsFeature cmdlet run from Windows PowerShell.
D.You should consider having the Install-TransportAgent.ps1 scri[t run from Windows PowerShell.