What should you do?

Your company has an Active Directory domain.
A server named Server1 runs Windows Server 2008 R2.
The Remote Desktop Services server role and the RD Web Access role service are installed on Server1.
You install the RD Gateway role service on Server1.
You create the Remote Desktop connection authorization policy.
Users report that they cannot connect to Server1.
You need to ensure that users can connect to Server1.
What should you do?

A.
Configure Network Access Protection (NAP) on Server1.

B.
Configure the Remote Desktop Resource Authorization Policy (RD RAP) on Server1.

C.
Create a Remote Desktop Group Policy object (GPO). Enable the Allow log on through Remote Desktop Services setting on the GPO. Link the GPO to the domain.

D.
Create a Remote Desktop Group Policy object (GPO). Enable the Set path for Remote Desktop Services Roaming User Profile setting on the GPO. Create an organization unit (OU) named RDSUsers. Link the GPO to the RDSUsers OU.

Explanation:
Remote Desktop resource authorization policies (RD RAPs) allow you to specify the internal network resources (computers) that remote users can connect to through an RD Gateway server. Remote users connecting to the network through an RD Gateway server are granted access to computers on the internal network if they meet the conditions specified in at least one RD CAP and one RD RAP.
Source: http://technet.microsoft.com/en-us/library/cc772397.aspx