To reduce latency for distributed users, which multi-location architecture should they adopt on GCP?

This option directly addresses latency reduction for distributed users by leveraging GCP's global infrastructure. A global load balancer intelligently routes user requests to the closest healthy backend, which in this case are regional managed instance groups. These groups automatically scale instances within their respective regions based on demand, ensuring optimal performance and low latency for users in different geographical locations. The other options are less effective or introduce unnecessary complexity. Forwarding requests between VMs (options 2 and 4) adds latency and management overhead. While regional managed instance groups do increase reliability through failover (option 3), the primary benefit for reducing latency for distributed users is the performance gain from geographically distributed, autoscaling backends.