（单选题）
What is the result of this command？（） RMAN> Report need backup days 3；
A Lists all datafiles created in the last three days that are not backed up.
B Lists all datafiles not recoverable based on the current retention criteria.
C Lists all datafiles not backed up in the last three days. The datafile is not recoverable.
D Lists all datafiles that need to be backed up due to unrecoverable operations.
E Lists all datafiles not backed up in the last three days. It does not imply that the datafile is not recoverable.
正确答案
答案解析
略
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