What is the most likely cause of this problem?

Your on-premises data center has 2 routers connected to your GCP through a VPN on each router. All applications are working correctly; however, all of the traffic is passing across a single VPN instead of being load-balanced across the 2 connections as desired.
During troubleshooting you find:
– Each on-premises router is configured with the same ASN.
– Each on-premises router is configured with the same routes and priorities.
– Both on-premises routers are configured with a VPN connected to a single Cloud Router.
– The VPN logs have no-proposal-chosen lines when the VPNs are connecting.
– BGP session is not established between one on-premises router and the Cloud Router.
What is the most likely cause of this problem?
A. One of the VPN sessions is configured incorrectly.
B. A firewall is blocking the traffic across the second VPN connection.
C. You do not have a load balancer to load-balance the network traffic.
D. BGP sessions are not established between both on-premises routers and the Cloud Router.

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