Your company runs Remote Desktop Services on Windows Server 2008. You have a Remote Desktop Session Host (RD Session Host) server. You plan to install an application on the RD Session Host server by running a setup.exe file. You need to ensure that the application will install properly and be useable by all users on the RD Session Host server. What should you do first on the RD Session Host server?（）

• A、Run the Changeuser /install command.
• B、Run the Changeuser /execute command.
• C、Set the Remote Desktop licensing mode to RDS Per User CAL.
• D、Set the Remote Desktop licensing mode to RDS Per Device CAL.