A customer wants to purchase a Windows 2003 DataCenter Edition system to run an application.  The application benefits the most by caching a vast amount of data in RAM so the user does not have to wait for disk I/O while editing.  Processing is second in importance.  If cost is not an issue， what machine will have the best performance？（）

• A、Use an x360 running 4 MP processors with 16GB of RAM
• B、Use an x360 running 4 DP processors with 16GB of RAM
• C、Use an x445 running 2 DP processors with 64GB of RAM
• D、Use an x445 running 4 DP processors with 64GB of RAM