How does the system mitigate against a split-brain state if all control plane and data plane links are lost?

A service provider has deployed new PEs using nV Edge technology based on Cisco ASR 9000 routers.

How does the system mitigate against a split-brain state if all control plane and data plane links are lost?
A . The chassis located in the second rack automatically shuts down and only the first rack chassis stays operational
B . Both chassis stay online operating as two different PEs
C . The two chassis send keepalive packets over any layer 2 cloud. The non-DSC chassis shuts down itself after it has received these additional keepalive packets
D . Both chassis stop receiving and forwarding data traffic until the control plane and data plane links are brought back up

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Answer: B