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A company currently has an internal web application hosted on EC2 but plans to rearchitect it using serverless architecture to optimize costs and take full advantage of the cloud's capabilities. However, the Chief Information Officer (CIO) is concerned about how to deploy changes to its application during the migration. The current deployment method involves creating a new Auto Scaling group of EC2 instances, a new Application Load Balancer, and using a Route 53 weighted routing policy to shift traffic. The CIO is required to retain the ability to try out new features on a limited number of users before releasing the traffic to all users. The new serverless application will include Amazon API Gateway and AWS Lambda. Which of the following deployment options should the DevOps Engineer implement to fulfill the requirements with the LEAST amount of effort?