You are using Windows Deployment Services (WDS) to deploy Windows 7 to your companys client computers. All servers in your network run Windows Server 2008 R2. The WDS server and the DHCP server are running on the same computer. You need to ensure that the client computers are able to connect to the WDS server by using PXE.
What should you do first?

A.
Add option 60 to the DHCP scope.

B.
Add option 64 to the DHCP scope.

C.
Block WDS from listening on port 60.

D.
Block WDS from listening on port 64.