A company uses AWS CodePipeline to automate the release process for a container-based application. The company hosts the application on an Amazon Elastic Container Service (Amazon ECS) cluster. Each time the company updates its code, the pipeline automatically builds and deploys the new version. The company uses AWS CodeDeploy for some deployments. Some deployments create issues for many users. A DevOps engineer must update the application delivery solution to add a step that validates changes with a subset of customers. The updated solution must support reverting failed deployments. Which solution meets these requirements?