Which three statements about performance analysis by SQL Performance Analyzer are true？（）

A

 It detects changes in SQL execution plans.

B

 It produces results that can be used to create the SQL plan baseline.

C

 The importance of SQL statements is based on the size of the objects accessed.

D

 It generates recommendations to run SQL Tuning Advisor to tune regressed SQLs.

E

 It shows only the overall impact on workload and not the net SQL impact on workload.