While deploying a new application module，the software vendor ships the application software along with appropriate SQL plan baselines for the new SQLs being introduced.  Which two statements describe the consequences？（）

• A、 The plan baselines can be evolved over time to produce better performance.
• B、 The newly generated plans are directly placed into the SQL plan baseline without being verified.
• C、 The new SQL statements initially run with the plans that are known to produce good performance under standard test configuration.
• D、 The optimizer does not generate new plans for the SQL statements for which the SQL plan baseline has been imported.