Your database is functioning in ARCHIVELOG mode. In which two situations would you perform a cancel-based 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.