A customer is ordering a new p650 server to be placed into an existing OEM 42U 19-inch rack containing only two p630 servers.  This is the first p650 in the enterprise.  What is the most important question that the pSeries technical specialist should ask the customer before the order is placed？（）

• A、Have the PDU requirements been met？
• B、Are there sufficient KVM connections？
• C、Is there sufficient service clearance？
• D、Is there sufficient space in the existing rack？