[单选] Which of the following statements best describes Flashback Versions Query？（）

A . Flashback Versions Query is used to make changes to multiple versions of data that existed between two points in time.
B . Flashback Versions Query is used to view all version changes on rows that existed between the time the query was executed and a point in time in the past.
C . Flashback Versions Query is used to view version changes and the SQL to undo those changes on rows that existed between two points in time.
D . Flashback Versions Query is used to view all version changes on rows that existed between two points in time.

体育与健康课程是一门以学习（）为基本内容。保险监督管理部门对保险公司实施接管不影响保险公司的债权债务关系。导致机器设备经济性贬值的因素有（）。宏观因素。微观因素。主观因素。客观因素。《中华人民共和国反洗钱法》的施行日期是（） 2007-1-1。 2007-3-1。 2007-7-1。 2007-10-1。双代号网络图是以（）及其两端节点的编号表示工作的网络图。代号。线段。箭线。曲线。 Which of the following statements best describes Flashback Versions Query？（）

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[单选] Which of the following statements best describes Flashback Versions Query？（）

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