The customer has recently installed a pSeries p5-570 with EMC attached disk storage.  After installation， the customer complained that the disk access appeared to be too slow.  How should the pSeries technical specialist best assist the customer？（）

• A、Recommend the customer call EMC.
• B、Recommend the customer call IBM hardware support.
• C、Recommend the customer contact SupportLine.
• D、Recommend the customer re-creates the volume groups.