The company stores CloudFormation templates and Docker images in one Region and needs a DR process in another Region with an RPO of 8 hours and an RTO of 2 hours. Building images can sometimes take longer than 2 hours. Which cost-effective solution meets the RPO and RTO?

The correct solution leverages native AWS replication features for efficiency and cost-effectiveness. Copying CloudFormation templates to S3 in the DR Region ensures infrastructure as code is available. Enabling Aurora automated cross-Region snapshot replication provides an RPO of minutes, easily meeting the 8-hour requirement. Enabling Amazon ECR cross-Region replication for container images ensures the latest images are available in the DR Region without needing to rebuild them, which is critical given that building images can exceed the 2-hour RTO. Deploying the stack with these pre-replicated assets and updating DNS minimizes RTO. The other options are less optimal: Rebuilding Docker images in DR could violate the 2-hour RTO. Using EventBridge and Lambda for replication is more complex and potentially more expensive than native AWS services. Maintaining a second deployed CloudFormation stack with Aurora Global Database is a higher-cost active-active or active-passive solution, exceeding the requirements for a cost-effective DR plan with an 8-hour RPO.