Which statement is true regarding the retention policy for the incidents accumulated in the AutomaticDiagnostic 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