A company is deploying a Microsoft Windows-based， mission-critical Data Warehousing application.  The customer has specified 4GB of RAM.  Which TWO of the following questions will best help the consultant determine the proper memory configuration？（）

• A、Does the application require a large paging space？
• B、What is the anticipated memory/disk cache hit ratio？
• C、Does the application support Physical Address Extensions （PAE）？
• D、Are there future plans to expand the amount of memory in the system？
• E、Do the application availability requirements justify the use of Memory Mirroring technologies？