For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is a BGP/MPLS VPN Service Provider (SP), which of the following is FALSE?

For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is a BGP/MPLS VPN Service Provider (SP), which of the following is FALSE?
A . The customer carrier network can be a pure IP network.
B . The customer carrier provides Layer 2 and Layer 3 services to its end-customers.
C . A single CSC VPRN is configured on the network provider to support all services offered by the customer carrier.
D . In the case where the customer carrier offers VPRN services, the model is referred to as hierarchical VPR

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Answer: A