单选题In your multitenant container database (CDB) containing pluggable databases (PDB), users complain about performance degradation. How does real-time Automatic database Diagnostic Monitor (ADDM) check performance degradation and provide solutions?（）A It
题目
单选题
In your multitenant container database (CDB) containing pluggable databases (PDB), users complain about performance degradation. How does real-time Automatic database Diagnostic Monitor (ADDM) check performance degradation and provide solutions?（）
A
It collects data from SGA and compares it with a preserved snapshot.
B
It collects data from SGA, analyzes it, and provides a report.
C
It collects data from SGA and compares it with the latest snapshot.
D
It collects data from both SGA and PGA, analyzes it, and provides a report