You are the network administrator for The network consists of a single Active Directory domain All network servers run Windows Server 2003, and all client computers run Windows XP Professional. TestKing includes a main office and several branch offices. You work in the main office. A DNS server named TESTKING1 is located in one of the branch offices. You need to perform DNS management on TESTKING1. First, you log on to a client computer. However, the computer does not have the DNS snap-in installed. What should you do next?（）

A. Install the Windows Support Tools on the client computer.
B. From a command prompt, start Nslookup.exe. At the prompt, type install.
C. Use Windows Explorer to open the c$ share on TESTKING1. Select \windows\system32 and install Adminpak.msi.
D. Use Windows Explorer to copy C:\windows\system32\dnsmgmt.msc from TESTKING1 to C:\windows\system32 on the client computer.