A company wants to use AWS Direct Connect to connect on-premises networks to AWS.

As the number of VPCs grows, managing individual VPC connections becomes complex and unscalable. AWS Transit Gateway is specifically designed to act as a central hub that connects multiple VPCs and on-premises networks through Direct Connect.

Option B simplifies network architecture by allowing hundreds or thousands of VPCs to connect through a single gateway, reducing routing complexity and operational overhead. Transit Gateway supports scalable routing, centralized inspection, and simplified expansion.

The other options do not address network connectivity or scaling challenges. Therefore, B is the correct solution.