YouareworkingonthePRODdatabase,whichisinNOARCHIVELOGmode.Youlosttheactiveonlineredologgroupduetoamediafailure.Howshouldyourecoveryourdatabase?()

A.RestorethedatabasefromawholeconsistentbackupandstartthedatabaseinMOUNTmode.Then，openthedatabasewiththeRESETLOGSoptionafterperformingacancel-basedrecovery.

B.RestorethedatabasefromawholeconsistentbackupandstartthedatabaseinMOUNTmode.Then，dropthelostredologgroupandopenthedatabasewiththeRESETLOGSoptionafterperformingacancel-basedrecovery.

C.RestorethedatabasefromawholeconsistentbackupandstartthedatabaseinMOUNTmode.Then，clearthelostredologgroupandopenthedatabasewiththeRESETLOGSoptionafterperformingacancel-basedrecovery.

D.Donothing.Youdonotneedtorecoverthedatabaseinthiscase；aninstancerecoverywillbeperformedbytheSMONprocessonstartup.