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