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单选题
If a backup set is expired, what can you do to correct the problem?()
A

 Change the retention criteria.

B

 Make the lost backup set pieces available to RMAN again.

C

 Run the crosscheck command to correct the location for the backup set piece contained in the metadata.

D

 Nothing. The backup set piece is lost forever.

E

 Call Oracle support,their assistance is required.


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