The company wants to centralize management of interface VPC endpoints and Route 53 zones in a shared services account while using a Transit Gateway hub-and-spoke model across accounts. The network services team must manage all Route 53 zones and interface endpoints centrally, and provide private access to AWS KMS without traffic going over the public internet. What should the engineer implement to achieve this?

The correct solution centralizes the KMS interface endpoint and Route 53 private hosted zone in the shared services account. Creating the endpoint in the shared services account allows for central management. Disabling the endpoint's private DNS name prevents automatic DNS resolution within the shared services VPC, allowing the private hosted zone to take precedence. The private hosted zone in the shared services account, with an alias record pointing to the endpoint, provides a consistent private DNS entry for KMS. Associating this private hosted zone with all spoke VPCs ensures that all spoke accounts can resolve the KMS endpoint privately without traversing the public internet, fulfilling the requirement for centralized management and private access. The other options are incorrect because they either decentralize the KMS endpoint or the Route 53 private hosted zone, or they incorrectly associate the private hosted zones, which would prevent centralized DNS resolution across all spoke VPCs.