View the Exhibit. One of the important tables in the USERS tablespace was dropped and purged from the recycle bin at 9：00 a.m. You noticed this at 11：00 a.m. and you want to perform an incomplete recovery to recover the table. Which statement is true？（）
- AYou must recover all data files to the required system change number （SCN）.
- BYou must recover all data files， except those that are offline， to the required SCN .
- CYou must recover all data files belonging to the USERS tablespace to the required SCN.
- DYou cannot recover all data files because segment space management is performed manually for the undo tablespace.