You are a DevOps engineer at a tech company that is building a scalable microservices-based application. The application is composed of several containerized services, each responsible for different parts of the application, such as user authentication, data processing, and recommendation systems. The company wants to standardize and automate the deployment and management of its infrastructure using Infrastructure as Code (IaC). You need to choose between AWS CloudFormation and AWS Cloud Development Kit (CDK) for defining the infrastructure. Additionally, you must decide on the appropriate AWS container service to manage and deploy these microservices efficiently. Given the requirements, which combination of IaC option and container service is MOST SUITABLE for this scenario, and why?