Your company has 40 branch offices that are linked by using a Software-Defined Wide Area Network (SD-WAN). The SD-WAN uses BGP. You have an Azure subscription t...

Your company has 40 branch offices that are linked by using a Software-Defined Wide Area Network (SD-WAN). The SD-WAN uses BGP.
You have an Azure subscription that contains 20 virtual networks configured as a hub and spoke topology. The topology contains a hub virtual network named Vnet1.
The virtual networks connect to the SD-WAN by using a network virtual appliance (NVA) in Vnet1.
You need to ensure that BGP route advertisements will propagate between the virtual networks and the SD-WAN. The solution must minimize administrative effort.
What should you implement?

A. An Azure VPN Gateway that has BGP enabled B. a NAT gateway C. Azure Traffic Manager D. Azure Route Server