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

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.