The primary operational responsibility for DBAs that has the most data Governance overlap is数据治理重叠最多的DBA的主要操作职责是:()?
（A）All所有
（B）Implementing appropriate backup and recovery mechanism实施适当的备份和恢复机制
（C）Scheduling run stats and reorganizations.计划运行统计和重组。
（D）Ensuring performance and reliability of databases确保数据库的性能和可靠性
（E）Creating mechanisms for clustering of data创建数据聚类机制
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