You need to recommend an operating system for Node1 and Node2. The recommendation must meet  the company’s technical requirements.Which operating system image should you install？（）

• A、a full installation of Windows Server 2008 R2 Enterprise
• B、a full installation of Windows Server 2008 R2 Standard
• C、a Server Core installation of Windows Server 2008 R2 Enterprise
• D、a Server Core installation of Windows Server 2008 R2 Standard