[多选题]

Which two statements are true about the Automatic Diagnostic Repository (ADR)?()

A . The ADR base keeps all diagnostic information in binary format

B . SQL*Plus provides the ADRI script, which can be used to work with ADR

C . The ADR can be used for problem diagnosis only when the database is open

D . The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null

E . The ADR can be used for problem diagnosis even when the database instance is down

F . The ADR base is shared across multiple instance

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