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單項選擇題

You issue the following command on the RMAN prompt.  
REPORT NEED BACKUP DAYS 5；  
Which statement is true about executing this command？（）  

A. It will display a list of files that need incremental backup
B. It will display a list of files that need backup after five days
C. It will display a list of files that were backed up in the last five days
D. It will display a list of files that have not been backed up in the last five days
E. It will apply the current retention policy to determine the files that need to be backed up

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