Which of the following statements is TRUE?

Which of the following statements is TRUE?
A . REORGCHK automatically runstables reorganization.
B . REORGCHK uses only current table and index statistics.
C . REORGCHK can only be used for user tables, not for system tables.
D . REORGCHK can be used to verify the level of data fragmentation and indicate whether reorganization might be required.

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Answer: D