（多选题）
Which two are the prerequisites to enable Flashback Data Archive？（）
A Database must be running in archivelog mode.
B Automatic undo management must be enabled.
C Undo retention guarantee must be enabled.
D The tablespace on which the Flashback Data Archive is created must be managed with Automatic Segment Space Management （ASSM）.
正确答案
答案解析
略
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