Users notify you that their application is failing every time they try to add new records. Because of poor application design， the actual ORA error message is unavailable. What might be the problem？（）
- A The application user has exceeded their undo quota.
- B The FLASHBACK GUARANTEE option is set on the undo tablespace.
- C The table is currently being queried by a Flashback Transaction Query operation.
- D The table is currently being queried by a Flashback Versions Query operation.
- E The RETENTION GUARANTEE option is set on the undo tablespace.