单选题
What is the output of this command?（）
发布日期：2020-04-10
A list of files that require a backup within 3 days
A list of files requiring more than 3 days of archivelogs to apply
A list of files that RMAN recommends be backed up only once in every three days, based on low volatility
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
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