（单选题）
In your database， UNDO_RETENTION has been set to 600 sec and UNDO tablespace is configured for RETENTION GUARANTEE. Which statement regarding RETENTION GUARANTEE is true？ （）
AUndo data is retained until the next full database backup.
BNo committed undo data will be overwritten for 10 minutes.
CCommitted undo data will be kept forever if not overwritten within 600 seconds.
DGuarantees that requested undo information are available until the instance is shut down.
正确答案
答案解析
略
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