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 Versions Query only
• D、Flashback Database and Flashback Transaction Query
• E、Flashback Versions Query and Flashback Transaction Query