Your company has a single Active Directory Domain Services （AD DS） domain and 1，000 client computers.  You are planning to deploy Windows 7 Enterprise to the client computers.    You need to design a zero-touch installation strategy.（）

• A、unattended installation
• B、custom Windows 7 image on DVD
• C、Windows Deployment Services （WDS）
• D、Microsoft System Center Configuration Manager 2007 R2