Which configuration should you use?

You are configuring a new application that will be exposed behind an external load balancer with both IPv4 and IPv6 addresses and support TCP pass-through on port 443. You will have backends in two regions: us-west1 and us-east1. You want to serve the content with the lowest possible latency while ensuring high availability and autoscaling.

Which configuration should you use?
A . Use global SSL Proxy Load Balancing with backends in both regions.
B. Use global TCP Proxy Load Balancing with backends in both regions.
C. Use global external HTTP(S) Load Balancing with backends in both regions.
D. Use Network Load Balancing in both regions, and use DNS-based load balancing to direct traffic to the closest region.

Answer: D