A customer has an IBM System Storage Enterprise Storage Server and several EMC CX3 systems installed in a data center， attached to IBM System p servers. As a step toward data consolidation， they intend to put all data on a new DS8700.  What would be the most important data migration factors to consider（）

• A、sector size and the amount of production data
• B、existing RAID levels and the disk drive speed
• C、sector size and existing RAID levels
• D、amount of production data and the disk drive speed