A.DS4500offersbetterconnectivitytotheIBMiSeriesServers.
B.DS4500shipswithremotevolumemirroring（RVM）andFlashcopyservices.
C.DS4500offersvirtualarraysandfibretapebackupoptionsthatmakeitalessexpensivesolution.
D.DS4500offersstoragemanagersoftwarestandardwhileEVArequirespurchasingofthemanagementsoftware.
E.DS4500offersaflexiblesolutioncustomizablebythecustomerwhileEVAshipsstandardwithaminimumofsixdiskenclosures.
参考答案：DE
