Which action is the vSmart controller responsible for in a Cisco SD-WAN deployment?

Which action is the vSmart controller responsible for in a Cisco SD-WAN deployment?

A. onboard WAN Edge nodes into the Cisco SD-WAN fabric B. gather telemetry data from WAN Edge routers C. distribute policies that govern data forwarding performed within the Cisco SD-WAN fabric D. handle, maintain, and gather configuration and status for nodes within the Cisco SD-WAN fabric