2021年2月1日 10Which two are true about the RMAN CROSSCHECK command?
选项：

A: It sets the status of RMAN repository entries for any missing files to OBSOLETE
B: It sets the status of RMAN repository entries for any missing files to EXPIRED
C: It checks for the existence of and validates the file headers for all specified backup sets, image copy, and archive log files.
D: It produces a detailed analysis of the RMAN repository
E: It identifies the files that are no longer required to satisfy backup retention policies.