What is the maximum number of servers possible in a Cisco Unified Contact Center Express 4.0 cluster, excluding ASR/TTS servers?（）

A.redundant Cisco CRS Engines and a simplex database server  
B.redundant Cisco CRS Engines with five simplex VoIP monitoring servers  
C.redundant Cisco CRS Engines and databases running on two different nodes outside of the Cisco CRS cluster  
D.redundant Cisco CRS Engines and databases with two VoIP monitoring servers and three recording servers

A.Cisco Unified CallManager Device Configuration
B.Cisco Unified Contact Center Express Directory Management  
C.Cisco Supervisor Desktop  
D.Cisco CRS Administration, JTAPI Trigger Creation  
E.Cisco Unified Contact Center Express Media Subsystem