WhatisthepurposeoftheRMANrecoverycatalog?()

A.ItmustbeusedbecauseallRMAN-relatedbackupandrecoverymetadatainformationiscontainedinit.

B.Itprovidesaconvenient，optional，repositoryofbackup-andrecovery-relatedmetadata.

C.ItprovidestheabilitytostoreRMANscriptsforglobalusebyanydatabasethathasaccesstotherepository.

D.ItprovidesameansofstoringallRMANbackupsetsphysicallyinanOracledatabaseserver.

E.Itprovidestheabilitytostorebackuprecordsformorethanayear.