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Which statement is true regarding the retention policy for the incidents accumulated in the Automatic Diagnostic Repository （ADR）？（）  
A: The incident metadata is purged when the problem is resolved and the DBA closes the SR
B: The incident files and dumps are not retained in the ADR for the manually created incidents 
C: The incident files are retained but the incident metadata is purged when the problem is resolved and the DBA closes the SR
D: The default setting is for one year after which the incident metadata is purged from the ADR and the files are retained for one month

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出自：Oracle认证

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