You have a Remote Desktop Session Host (RD Session Host) server. The server is accessible from the
internal network.
To access the server remotely, you must connect to a Remote Desktop Gateway (RD Gateway) server.
On a laptop, you successfully configure a Remote Desktop connection that you use to access the RD Session
Host server from the internal network.
From your home, you attempt to connect to the RD Session Host server by using the Remote Desktop
connection, but the connection fails.
You need to connect to the RD Session Host server.
What should you configure on the laptop?

A.
the Remote Assistance settings in System Properties.

B.
the Connect from anywhere settings in Remote Desktop Connection.

C.
the Performance settings in Remote Desktop Connection.

D.
the Remote Desktop settings in System Properties.

Explanation:
https://technet.microsoft.com/en-us/library/cc770601(v=ws.11).aspx