Observe the following warning in an RMAN session of your database instance：   WARNING:// new failures were found since last LIST FAILURE command   Which statement describes the scenario that must have produced this warning？（）

• A、 The CHANGE FAILURE command has detected new failures recorded in the Automatic Diagnostic Repository（ADR）
• B、 The VALIDATE DATABASE command has detected new failures recorded in the Automatic Diagnostic Repository （ADR）
• C、 The ADVISE FAILURE command has detected new failures recorded in the Automatic Diagnostic Repository （ADR） since the last LIST FAILURE
• D、 The RECOVER command has detected new failures recorded in the Automatic Diagnostic Repository （ADR） since the last LIST FAILURE command was executed