You are the domain administrator for TestKing's Active Directory domain named All client computers run Windows XP Professional. You need to implement a solution for managing security updates on client computers. You plan to use a Windows Server 2003 computer to manage security updates. Your solution for managing security updates must meet the following requirements: 1. You must not purchase additional software or licences. 2. Security updates must be installed automatically. 3. You must be able to control which updates are available to install. 4. Security updates must synchronize automatically with the latest updates offered by Microsoft. You need to implement a solution for managing security updates that meets the requirements. What should you do?（）

• A、Publish the security updates by using a Group Policy object (GPO). Assign the GPO to the client computers that require updates
• B、Install Software Update Services (SUS). Configure the SUS software to synchronize daily with Microsoft. Use Group Policy to configure the appropriate Windows Update settings on the client computers.
• C、Install Microsoft Internet Security and Acceleration (ISA) Server on a Windows Server 2003 computer.
• D、Create a process to run Windows Update on all client computers.