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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.

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出自：Oracle认证

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