What are two roles that SD-WAN orchestrator plays when it works with FortiManager? (Choose two)

What are two roles that SD-WAN orchestrator plays when it works with FortiManager? (Choose two)
A . It acts as an application that is released and signed by Fortinet to run as a part of management extensions on FortiManager
B . It configures and monitors SD-WAN networks on FortiGate devices that are managed by FortiManager.
C . It acts as a standalone device to assist FortiManager to manage SD-WAN interfaces on the managed FortiGate devices
D . It acts as a hub FortiGate with an SD-WAN interface enabled and managed along with other FortiGate devices by FortiManager

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Answer: B,D