Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)
A. The number of table rows is considered when evaluating the cost of accessing a table using an index.
B. Index balanced B*Tree height is considered when evaluating the cost of using an index.
C. The Statistics Advisor can help recommend the best way to gather statistics.
D. Statistics collected using DBMS_STATS always yield the best optimizer result.
E. The Statistics Advisor generates actions for all recommendations.
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