Which three statements are true about adaptive SQL plan management?（）
- A It automatically performs verification or evolves non-accepted plans, in COMPREHENSIVE mode when they perform better than existing accepted plans.
- B The optimizer always uses the fixed plan, if the fixed plan exists in the plan baseline.
- C It adds new, bettor plans automatically as fixed plans to the baseline.
- D The non-accepted plans are automatically accepted and become usable by the optimizer if they perform better than the existing accepted plans.
- E The non-accepted plans in a SQL plan baseline are automatically evolved, in COMPREHENSIVE mode, during the nightly maintenance window and a persistent verification report is generated.