A、 a list of files that require a backup within three days

B、 a list of files requiring more than 3 days of archive logs to apply

C、 a list of files that RMAN recommends be backed up only once in every three days，based on low volatility

D、 a list of files for which a backup has already been performed in the last three days and which is required to be backed up again based on the high number of transactions performed on them