What is the output of this command?（）

• A、A list of files that require a backup within 3 days
• B、A list of files requiring more than 3 days of archivelogs 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 as 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