Your database is functioning in ARCHIVELOG mode. In which two situations would you perform a cancel/x7fbased recovery？（）

• A、You find that one of the redo log members in each redo log group is lost.
• B、You find that a data file that belongs to the USERS tablespace is damaged.
• C、You find that a data file that belongs to the SYSTEM tablespace is damaged.
• D、You find that the current redo log group is damaged and is not available for recovery.
• E、You realized while performing a recovery that an archived redo log file needed for recovery is lost.