（单选题）
Which statement is true about the UNDO_RETENTION parameter when retention guarantee is notenabled（）
AIt is the time period after which the undo data becomes obsolete.
BIt is the time period after which the committed undo data would be transferred to a temporarytablespace.
CIt is the minimum time period up to which the committed undo data would be retained if free undo spaceis available.
DIt is the time period after which the undo data is transferred to the Flash Recovery Area to provide readconsistency.
正确答案
答案解析
略
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