A. Connect the AWS accounts with AWS Transit Gateway. Establish an AWS Site-to-Site VPN connection with the data center, and attach the connection to the transit gateway. Route traffic from the data center to all AWS accounts.
B. Connect the AWS accounts with VPC peering. Establish an AWS Site-to-Site VPN connection with the data center. Route traffic from the data center to all AWS accounts.
C. Connect the AWS accounts with VPC peering. Establish an AWS Direct Connect connection to the closest AWS Region. Route traffic from the data center to all AWS accounts.
D. Connect the AWS accounts with AWS Transit Gateway. Establish an AWS Direct Connect connection to the closest AWS Region, and attach the connection to the transit gateway. Route traffic from the data center to all AWS accounts.

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