Answers A, B, and C are correct. DBCC CHECKTABLE can analyze and repair table issues. ALTER INDEX REORGANIZE can repair index fragmentation. UPDATE STATISTICS may provide for more appropriate query plans, particularly if it is used after mass alterations, additions, or deletions to data. CREATE STATISTICS provides the capabilities of creating additional statistics to be used by the Optimizer and does not apply in this instance. DBCC SHOWSTATISTICS displays distribution statistics for a table but does nothing to perform maintenance. DBCC UPDATEUSAGE reports and corrects pages and row count inaccuracies in the catalog views, providing for more accurate space usage readings.
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