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

• 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 instances