The storage specialist needs to prepare an IBM System Storage DS8800 proposal including 64 host ports. The offer needs to meet the lowest possible price.  What is the minimum number of I/O Enclosure Pairs PCI-E for this configuration（）

• A、one I/O enclosure pair PCI-E
• B、two I/O enclosure pairs PCI-E
• C、four I/O-enclosure pairs PCI-E
• D、eight I/O-enclosure pairs PCI-E