What two things happen when the CRS Publisher Database on an HRDB expansion server fails?（）

• A、All call processing immediately begins using the CRS Subscriber Database. 
• B、Calls in queue are dropped. 
• C、Agent calls are dropped. 
• D、Agents are automatically logged out. 
• E、CRS configuration changes are blocked until the CRS Publisher Database is restored and synchronized with the CRS Subscriber Database. 
• F、Configuration changes are buffered until the CRS Publisher Database is restored.