Which two statements about ADDM are true?

Which two statements about ADDM are true?

A.
Real-Time ADDM uses AWR snapshots of the last 10 minutes.

B.
Real-Time ADDM uses ASH recent activity from SGA data.

C.
Real-Time ADDM analyzes performance in a completely different fashion than regular ADDM.

D.
Regular ADDM uses AWR snapshots that are not yet purged.

Explanation:
http://www.dba-scripts.com/articles/ocp-flashcards/ocp-12c-emergency-monitoring-real-time-addm/