AclusteradministratorhasbeenaskedtoinstallHACMPontwonodeswiththefollowinghardware：-twoCPUs，-1GBRAM，-one136GBdrive，-two10/100/1000Ethernetadapters，and-GBFibreChanneladaptersdualattachedtoSANstorage.Inordertoeliminatesinglepointsoffailure，theadministratorshouldfirstaddwhichofthefollowing：（）

A.anadditional1GBRAMtoeachnode.

B.Anotherbootablemirroreddiskdrive.

C.A10/100/1000GBEthernetadaptertobeattachedtoaredundantswitch.

D.Nothing，becausethisisaviableclustersolutionwithnosinglepointsoffailure.