You are increasing your usage of Cloud VPN between on-premises and GCP, and you want to support more traffic than a sing

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You are increasing your usage of Cloud VPN between on-premises and GCP, and you want to support more traffic than a single tunnel can handle. You want to increase the available bandwidth using Cloud VPN.
What should you do?

A. Double the MTU on your on-premises VPN gateway from 1460 bytes to 2920 bytes.
B. Create two VPN tunnels on the same Cloud VPN gateway that point to the same destination VPN gateway IP address.
C. Add a second on-premises VPN gateway with a different public IP address. Create a second tunnel on the existing Cloud VPN gateway that forwards the same IP range, but points at the new on-premises gateway IP.
D. Add a second Cloud VPN gateway in a different region than the existing VPN gateway. Create a new tunnel on the second Cloud VPN gateway that forwards the same IP range, but points to the existing on-premises VPN gateway IP address.