问题：
[多选] You are the network administrator for your company. The network consists of a single Active Directorydomain. All network servers run Windows Server 2003. All client computers run Windows XP Professional SP2.Server1 is a domain controller. Server2 runs Windows Software Update Services (WSUS). No options have been changed in the administrative console.You configure the client computers to access the services on Server1 and Server2. An initial synchronization and approval is successfully completed. The client computers receive and install the approved patches successfully.Three months later, Microsoft releases a critical security update for Windows XP Professional. From a test client computer, you use Microsoft Update to download the update. You test the update and receive no error messages.Now you need to deploy the update to all client computers as quickly as possible. You must ensure that the update is not deployed to any servers.Which two actions should you perform? （）(Each correct answer presents part of the solution. Choose two.)
A . On Server1, configure the Default Domain Policy Group Policy object (GPO) to distribute the security update.
B . On Server1, initiate replication.
C . On Server2, initiate synchronization.
D . On Server2, approve the security update.
