问题：

[单选]

You are the network administrator for Company. 
You have been assigned the task to upgrade the 23 Windows NT Workstation 4.0 computers in the accounting department to Windows 2000 Professional. Users in the accounting department run a peer-to-peer financial and credit application on their computers. The application requires that information is passed between the accounting department computers over the network. You upgrade all the computers and configure them to have the default security settings. You want to ensure that network traffic between accounting computers is secure. What should you do? （）

A . Disable NetBIOS over TCP/IP on the accounting department computers.
B . Apply the Hisecws.inf security template to the local security policy on the accounting department computers.
C . Enable the Encrypting File System （EFS） on all files used by the financial and credit application on the accounting department computers.
D . Configure port filters for each port used by the financial and credit application on the accounting department computers.