You are the network administrator for your company. The network consists of a single Active Directory domain. All servers run Windows Server 2003. All client computers run Windows XP Professional with themost recent service pack. All client computers have computer accounts in an organizational unit （OU） named CompanyComputers. The company requires all computers to be kept up-to-date with service packs and hotfixes from Microsoft. Administrators will manually update servers as required. You need to configure the network so that client computers are automatically updated as new critical updates are issued.  What are two possible ways to achieve this goal？（）

• A、 Create a Group Policy object （GPO） linked to the domain. Configure the GPO so that client computers automatically download and install updates from Microsoft update servers from the Internet.
• B、 Create a Group Policy object （GPO） linked to the CompanyComputers OU. Configure the GPO so that client computers automatically download and install updates from Microsoft update servers from the Internet.
• C、 Create a Group Policy object （GPO） linked to the domain. Configure the GPO so that client computers automatically download and install updates from an internal server on which you install and configure Software Update Services.
• D、 Create a Group Policy object （GPO） linked to the CompanyComputers OU. Configure the GPO so that client computers automatically download and install updates from an internal server on which you install and configure Software Update Services.