An organization's present network architecture will be expanded. When completed, there will be 99 VPCs distributed among

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An organization's present network architecture will be expanded. When completed, there will be 99 VPCs distributed among 11 AWS accounts (9 VPCs per account).
There is now an AWS Direct Connect connection to a single account that has nine virtual private clouds (VPCs), each with its own virtual network interface (VIF).

Which of the following concepts will save the organization money while enabling it to grow?

A. Order 10 new Direct Connect connections, one from each of the accounts that will be provisioned. Create private VIFs in each account. Attach one private VIF per VPC.
B. Create a public VIF on the Direct Connect connection. Leverage the public VIF to create a VPN connection to each VPC.
C. Create hosted private VIFs in the existing account. Connect a private VIF to an AWS Direct Connect gateway in each account. Connect the gateway in each account to the VPCs.
D. Create a transit VPC in the existing account that consists of two routers in separate Availability Zones. Connect each VPC to the two routers in the transit VPC by using VPN.