Choose the best answer.
Examine this configuration:
1-. CDB1 is a container database.
2-. There are several pluggable databases (PDBs) in CDB1.
5-. Each PDB has several tables with referential integrity constraints.
6-. FLASHBACK DATABASE is ON.
7-. UNDO RETENTION GUARANTEE is enabled.
Multiple undesired multitable changes were made in all the PDBs.
Which method can be used to undo the changes using a single command?
A.restore and recover database B.flashback transaction C.flashback database D.flashback table and transaction E.flashback table正确答案C
