You are a desktop support technician for Contoso, Ltd. You need to install Windows XP Professional on a new desktop computer and to join the computer to the Active Directory domain named contoso.com.

During the installation process, you enter static IP addresses for the computer, default gateway, and DNS server. When you attempt to join the computer to the domain, you receive the following error message:
“An invalid domain was specified. Would you like to proceed for now and try to join a domain later?”

You verify that the domain name is entered correctly and that the computer is physically connected to the network. You are able to log on to the domain from your own computer.

You need to join the new computer to the domain and complete the installation of Windows XP Professional.

What should you do?

A.
Configure the TCP/IP properties of the new computer to disable the use of an automatic private IP address.

B.
Configure the TCP/IP properties of the new computer to use the correct IP address for the default gateway and DNS server.

C.
Verify with your network administrator that the DHCP server is running and online.

D.
Type the domain name as www.contoso.com when joining the domain.