问题：

[单选]

You are the network administrator for ExamSheet. 
Computers on your network run Windows 2000 Professional, Windows NT Workstation 4.0 and Windows 98. Ten Windows 2000 Professional computers are located in the research department. These computers contain highly confidential information. You want the 10 Windows 2000 Professional computers to be able to communicate only with other Windows 2000 computers. 
What should you do?（）

A . On the research computers use the Local Computer Policy to disable theAccess this computer  from the networkoption.
B . Use Security Configuration and Analysis to apply the Highly Secure security template to the research computers.
C . Add the users of the research computers to the Power Users group on each computer.
D . On the research computers configure the security settings to prevent anonymous access.