How is routing information distributed on such a network?

A network administrator is planning a new network with a segment-routing architecture using a distributed control plane.

How is routing information distributed on such a network?
A . Each segment is signaled by a compatible routing protocol, and each segment makes its
own steering decisions based on SR policy.
B. Each segment is signaled by MPLS, and each segment makes steering decisions based on the routing policy pushed by BGP.
C. Each segment is signaled by an SR controller, but each segment makes its own steering decisions based on SR policy.
D. Each segment is signaled by an SR controller that makes the steering decisions for each node.

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Answer: D