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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债权结算账户的贷方登记（）
A. 应收款项的增加、预收款项的增加
B. 应收款项的增加、预付款项的减少
C. 应收款项的减少、预收款项的减少
D. 应收款项的减少、预付款项的减少
宋辽、宋夏、宋金和议的共同点不包括（）。
A. 结束了双方大规模的战争状态
B. 导致了南北对峙局面的形成
C. 有利于北方各少数民族经济的发展
D. 客观上有利于双方和平相处
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