What Does a Citrix Engineer Need to Consider When Upgrading

What does a Citrix Engineer need to consider when upgrading the Workspace Environment Management (WEM) Administration Console?

A) The PowerShell command New-DatabaseConfiguration must be run prior to updating the Administration Console.
B) The Agent must be upgraded prior to upgrading the Administration Console.
C) The associated .DLL files must be updated using the command-line interface after upgrading the Administration Console.
D) The infrastructure service and the database must be upgraded prior to upgrading the Administration Console.