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.
出自:Oracle认证