Your role of Network Administrator at ABC.com includes the management of the Active Directory

Domain Services (AD DS) domain named ABC.com. The network includes servers that run
Windows Server 2012.
You have recently installed a Remote Desktop Services (RDS) infrastructure. The RDS
infrastructure includes a Remote Desktop Web Access (RD Web Access) server, a Remote
Desktop Connection Broker (RD Connection Broker) and a Remote Desktop Virtualization Host
(RD Virtualization Host) server.
You plan to add a Remote Desktop Gateway (RD Gateway) server to the RDS infrastructure.
You obtain a third-party certificate to secure connections to the RD Gateway server.
You need to configure the RDS infrastructure to use the RD Gateway server and the third-party
certificate.
Which server or servers should you add to the server pool?

A.
The RD Web Access Server.

B.
The RD Connection Broker Server.

C.
The RD Virtualization Host Server.

D.
The RD Web Access Server and the RD Connection Broker Server.