单项选择题AcustomerwithanIBMPowerSystemrunningAIXisusinganIBMSystemStorageDS8100inLocationA,andanIBMSystemStorageDS5100inLocationB.ThedistancebetweenLocationAandLocationBis25kilometers.ThecustomerwantsaredundantcopyofthedatainLocationBfordisasterrecovery.Whichofthefollowingsolutionswillbestsatisfythisrequirement?()
A.install FlashCopy on the DS8100
B.install SAN Volume Controllers with FlashCopy
C.install SAN Volume Controllers with Metro Mirror
D.install Global Mirror on the DS8100 and Enhanced Remote Mirror on the DS5100