Exhibit：  You are the network administrator for Company. You wish to upgrade the 100 computers in the main office from Windows 98 to windows 2000 Professional. By using Setup Manager you create an Unattend.txt file. The hardware configuration of each computer is identical. You run a test by upgrading one of the computers. As part of the upgrade you will be changing the computer names for the 100 computers and you will be configuring the computers to use DHCP. When you attempt to upgrade the remaining computers， you receive the message shown in the exhibit. You want to complete the automated installation on the remaining Windows 98 computers. What should you do？（）

• A、Change the computer name on each of the remaining Windows 98 computers.
• B、Change the computer name for the computer that has successfully upgraded to Windows 2000 Professional.
• C、Create a .udf file with separate computer names for each computer.
• D、Creata a .udf file with separate TCP/IP addresses for each computer.