By mistake， you ran the batch job （for updating the BILL_DETAILS table） twice. You are not sure which rows in the BILL_DETAILS table were affected. You need to identify： a） A list of changes made along with the transaction identifier of each change. b） The necessary SQL statements to undo the erroneous changes. Which option would you choose？（）
- A RMAN only.
- B Flashback Table only.
- C Flashback Version Query only.
- D Flashback Database and Flashback Transaction Query.
- E Flashback Version Query and Flashback Transaction Query.