You are an administrator of ETECHSOL.COM domain.  You want to install Win2000 Professional on 20 new PXE compliant computers that do not have any operating systems installed on them.  You create a RIS image and load the image onto the RIS server and then start the new computers. You find that the new computers cannot connect to the RIS server. You verify that existing client computers on the network can connect to network servers also.  What should you do? （）

• A、 Create an Active Directory on a server.
• B、 Setup a server to act as a DHCP server.
• C、 Install a Remote Access Server.
• D、 Enable TCP/IP on the client computers.