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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


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