66、Examine these SQL statements and their output:
A. Inactive undo will never be retained for more than 15 minutes.
B. The undo tablespace can grow automatically if there is not enough space to retain active undo.
C. Inactive undo will be retained as long as possible within the limits of the current size of the undo tablespace.
D. Inactive undo will always be retained for at least 15 minutes.
E. Active undo will be retained as long as needed by transactions.
Correct Answer: BE
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