A. Private Subnet with an egress-only Internet Gateway attached to the subnet and placed in the subnet Route Table.
B. Public subnet with an egress-only Internet Gateway attached to the VPC and placed in the VPC Route Table.
C. Private subnet with an egress-only Internet Gateway attached to the VPC and placed in the subnet Route Table.
D. Public subnet and a security group that blocks inbound IPv6 traffic attached to the interface.

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