What is one function of the vSmart controller in an SD-WAN deployment?

What is one function of the vSmart controller in an SD-WAN deployment?
A . orchestrates vEdge and cEdge connectivity
B . responsible for the centralized control plane of the SD-WAN network
C . provides centralized network management and a GUI to monitor and operate the SD-WAN overlay
D . provides a data-plane at branch offices to pass traffic through the SD-WAN network

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Answer: B