（多选题）Which two statements are

题目描述

AThe ADR base keeps all diagnostic information in binary format

BSQL*Plus provides the ADRI script, which can be used to work with ADR

CThe ADR can be used for problem diagnosis only when the database is open

DThe ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null

EThe ADR can be used for problem diagnosis even when the database instance is down

FThe ADR base is shared across multiple instances