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YouaremaintainingyourOLTPdatabaseinOracle10g.YouhavenotsetthewarninglevelandcriticallevelthresholdvaluesforspaceusageoftheDATA1tablespace.Whatwillbetheimpact?()

A.Nowarninglevelorcriticallevelalertwillbegenerated.
B.Awarninglevelalertwillneverbegenerated,butacriticallevelalertwillbegeneratedwhen97percentspaceoftheDATA1tablespaceisused.
C.Acriticallevelalertwillneverbegenerated,butawarninglevelalertwillbegeneratedwhen85percentspaceoftheDATA1tablespaceisused.
D.Awarninglevelalertwillbegeneratedat85percentspaceusageoftheDATA1tablespace,andacriticallevelalertisgeneratedat97percentspaceusageoftheDATA1tablespace.
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