A.The standby database is protected against write operations. 
B.The primary database is protected against write operations. 
C.The primary database is protected against data loss and data divergence. 
D.The standby database is protected against data loss and data divergence. 

A.An improved version of multithreaded server configuration. 
B.A connection pooling configuration where several clients are connected to the same server process. 
C.Two more database servers, which share data by means of database links; the client software is unaware to which server it is connected. 
D.A configuration of Real Application Cluster where the client connection is routed to the least busy instance.