Whileinstallingtheequipmentforanewtwo-nodecluster，itisdiscoveredthatthedisksubsystemRackhasoneconnectiontothepowermains.Theexplanationgivenwasthatthedisksaretobemirroredbetweenthetwodiskdrawersintherackandthatafailureineitherofthediskdrawerswouldsimplyresultinhalfofthediskbeinglost.Whatcanbedonetoavoidasinglepointoffailure？（）

A．CustomizeHACMPtoovercomequorumissues. B．AddasecondPDUtoseparatethepowerconnections. C．UseRAID5whenimplementingtwoIOracksinaHACMPenvironment. D．Addanothershareddisktoeachvolumegrouptoavoidquorumissuesduringfallover.