A、The ADDM requires at least four AWR snapshots for analysis.

B、The ADDM runs after each AWR snapshot is collected automatically by MMON.

C、The results of the ADDM analysis are stored in the Automatic Workload Repository （AWR）.

D、The ADDM analysis provides only diagnostic information but does not provide recommendations.

E、The ADDM calls other advisors if required， but does not provide recommendations about the advisors.