What are the three requirements for Best Services Routing (BSR) polling over IP without the B-channel signaling-group? (Choose three.)

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What are the three requirements for Best Services Routing (BSR) polling over IP without the B-channel signaling-group? (Choose three.)
A . Max number of CA TSC
B . Max number of NCA TSC
C . Trunk Group for NCA TSC
D . TSC Supplementary Service Protocol: b
E . Route pattern must have TSC = N

Answer: B,C,D