The EMP table exists in your schema. You want to execute the following query：   SELECT ename， sal FROM emp AS OF TIMESTAMP （SYSTIMESTAMP - INTERVAL ’6’ MINUTE）   WHERE ename = ’ALLEN’；   What are the minimum requirements for the statement to execute successfully？（）

• A、 ARCHIVELOG mode must be enabled
• B、 Row Movement must be enabled for the table
• C、 FLASHBACK must be set to ON for the database
• D、 The UNDO_MANAGEMENT parameter must be set to AUTO
• E、 The UNDO_RETENTION parameter must be set appropriately