Which of the following statements is true regarding implementing a Flashback Table recovery？ （）
- A An SCN is never used to perform a Flashback Table recovery.
- B If a significant number of changes have been made to the table， row movement must be enabled.
- C The tablespace must be offline before performing a Flashback Table recovery.
- D Flashback Table recovery is completely dependent on the availability of undo data in the undo tablespace.