You are the network administrator for your company's Active Directory domain. The domain includes Windows Server 2003 domain controllers and Windows XP Professional client computers. A new administrator named Paul is hired to assist you in deploying Windows XP Professional to 100 new computers. Paul installs the operating system on a new computer named Client1. However, when Paul tries to log on to the domain from Client1, he is unsuccessful. The logon dialog box does not allow him to view and select the domain name. You need to ensure that Paul can log on to the domain from Client1. What should you do? （）
- A Enable the computer account for Client1.
- B Configure Client1 as a member of the domain.
- C Add Paul's user account to the Enterprise Admins group.
- D Add Paul's user account to the Server Operators group.