In Microsoft Remote Desktop Services, What is the correct command that should be executed before installing software onto a terminal server?

 In Microsoft Remote Desktop Services, What is the correct command that should be executed before installing software onto a terminal server?

• change user /install
• set mode /install
• change /system install
• Set-Mode "Install"        

EXPLANATION

To install an end-user application on an RD Session Host server, the RD Session Host server must first be switched into a special install mode called RD-Install to ensure that the application will be able to run in a multi-user environment. After your applications have been installed on your RD Session Host server, you must switch the server back into execution mode (RD-Execute) before users can remotely connect to your server. You can switch between the install and execute modes from the command line using these commands:
change user /install
change user /execute

SOURCE

https://technet.microsoft.com/en-us/library/ff432698.aspx