053-431

Which of the following options describes Segment Shrink?
A. Reclaims space above and below the high-water mark without using additional space
B. Moves rows to a new physical location, resetting the high-water mark, but uses additional space during the operation
C. Deallocates space above the high-water mark that is currently not in use
D. None of the above

　　段收缩：主要就是调整高水位来利用更多的空闲空间