In a Cisco Unified Contact Center Enterprise design with a Cisco Unified
Communications Manager cluster with three nodes:

Publisher (PUB)
Subscriber 1 (Sub1)
Subscriber 2 (Sub2)

For 500 agents with 1:1 redundancy option, PG A and B connect to Sub1 and Sub2 respectively. What is the proper configuration of device pools and the Cisco Unified Communications Manager groups for redundancy?

A.
Device Pool 1 (CCM Group1 – Sub1, Sub2)
Device Pool 2 (CCM Group2 – Sub2, Sub1)

B.
Device Pool 1 (CCM Group1 – Pub, Sub1)
Device Pool 2 (CCM Group 2 – Pub, Sub1)

C.
Device Pool 1 (CCM Group1 – Sub1, Sub2)
Device Pool 2 (CCM Group 2 ?Sub1, Sub2)

D.
Device Pool 1 (CCM Group1 – Pub, Sub2)
Device Pool 2 (CCM Group 2 – Pub, Sub2)