The company must connect its on-premises data center to AWS and link all VPCs across multiple Regions with transitive routing between VPC networks. The solution should reduce outbound network costs, increase bandwidth, and provide a consistent network experience for users. Which design meets these requirements?

The correct solution uses AWS Direct Connect for increased bandwidth and reduced outbound costs, as data transfer out over Direct Connect is cheaper than over the internet. A transit VIF attached to a Direct Connect gateway allows connectivity to multiple VPCs across Regions. Using a Transit Gateway in each Region provides transitive routing between VPCs and centralizes network management, ensuring a consistent network experience. The incorrect options either lack the cost and bandwidth benefits of Direct Connect, do not provide transitive routing across multiple Regions effectively, or involve complex, less scalable peering configurations. Site-to-Site VPN alone does not offer the same bandwidth or cost benefits as Direct Connect for high-volume data.