Which two statements are true about the Automatic Database Diagnostic Monitor （ADDM）（）
- AThe ADDM requires at least four AWR snapshots for analysis.
- BThe ADDM runs after each AWR snapshot is collected automatically by MMON.
- CThe results of the ADDM analysis are stored in the Automatic Workload Repository （AWR）.
- DThe ADDM analysis provides only diagnostic information but does not provide recommendations.
- EThe ADDM calls other advisors if required， but does not provide recommendations about the advisors.