YouexecutedthefollowingcommandinRecoveryManager(RMAN):RMAN>REPORTNEEDBACKUPda
A.alistoffilesthatrequireabackupwithinthreedays
B.alistoffilesrequiringmorethan3daysofarchivelogstoapply
C.alistoffilesthatRMANrecommendsbebackeduponlyonceineverythreedays，basedonlowvolatility
D.alistoffilesforwhichabackuphasalreadybeenperformedinthelastthreedaysandwhichisrequiredtobebackedupagainbasedonthehighnumberoftransactionsperformedonthem
正确答案：参考A
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