A customer wants to implement a clustered database solution on their existing x445 servers.  A minimum of four nodes must participate in the cluster， and the customer wishes to use open standards.  Which of the following best satisfies their requirements？（）

• A、Novell NetWare Cluster Services
• B、Red Hat Enterprise Linux Cluster Suite
• C、Microsoft Windows 2003 Server with MSCS
• D、Microsoft Windows 2003 Enterprise Edition