Which is a benefit of using the IBM DS8000 FlashCopy SE （PTC-SE）（）

• A、FlashCopy SE （PTC-SE） is much faster than the traditional DS8000 full-volume FlashCopy
• B、FlashCopy SE （PTC-SE） also supports background copy
• C、FlashCopy SE （PTC-SE） is optimized for use in cases where a high percentage of the source volume is updated during the life of the relationship
• D、the additional capacity required forFlashCopy SE （PTC-SE） must only be planned for data which is changed on the source volume during host I/O transaction