You have a server that runs Windows Server 2008. The server has the Web Server （IIS） server role installed.   The server contains a Web site that is configured to use only Windows Authentication. You have a security group named Group1 that contains several user accounts.  You need to prevent the members of Group1 from accessing a Web site. You must not prevent other users from accessing the Web site.  Which Web site feature should you configure？（）

• A、Authentication
• B、Authorization Rules
• C、IIS Manager Permissions
• D、SSL Settings