Acustomerhasrequestedfiverackmountedservers,andarack.Theywantredundantpowerconnections.Whichofthefollowingisrequiredtomeettheserequirements?()

A.Redundantpowersuppliesontheservers

B.RedundantPDUsintherack

C.edundantpowersuppliesintheserversandredundantPDUsintherack

D.Redundantpowersuppliesintheservers，redundantPDUsintherack，andActiveEnergy Manager（AEM）