You are the network administrator for The network consists of a single IP subnet. All servers are Windows Server 2003. All client computers run Windows XP Professional. The corporate firewall blocks all requests from the local client computers to port 80 in the Internet. Requests sent over port 443 are allowed through the firewall. Server computers can communicate by using port 80 are 443 to the Internet. You need to install Software Update Services (SUS) on a computer named Testking5. Testking5 has limited hard drive space and stores a minimal amount of information daily. Client computers must install Microsoft critical updates. You need to ensure that Testking5 does not run out of hard drive space after the installation of SUS. What should you do?（）

A. On Testking5, clear the selection of all locales not used on your network.
B. On Testking5, select the option to maintain the updates on a Windows Update server.
C. Modify the default home page for all client computers to https://windowsupdate.microsoft.com.
D. Modify the proxy server setting for all client computers to http://testking5.