A customer wants to purchase an IBM System Storage DS8700 to support a high-performance database environment.  Which technical solution gives the customer the best relationship between I/O performance at the machine’s backend vs. capacity installed in the machine（）

• A、additional installation of the first and second expansion frame will increase the backend performance capability
• B、the usage of 300 GB/15k FC disks will give the server a high-performance backend capability
• C、performance Accelerator restricts the number of disks connected to one device adapter pair to 32 disks
• D、the second RIO-G loop between the base frame and the first expansion increases the backend performance