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单项选择题Which components are needed for successful and most efficient recovery.（）  

A、 The backup RB3 and the current online redo log files

B、 the backup RB2 and the archived redo log files after the log sequence number 15622

C、 Backup R81 and the archived redo log hies after the log sequence number 12871

D、 The backup RB3 and the archived redo log files after the log sequence number 16721

  • A

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