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The correct choice is CaaS, which stands for Container as a Service. This type of cloud computing service specifically enables subscribers to manage and deploy containerized applications. By providing a robust platform for the development, deployment, and management of containerized applications, CaaS supports developers in building scalable applications both in the cloud and within on-site data centers.

CaaS typically includes features such as automated orchestration, load balancing, and scaling, which are essential for handling containerized workloads efficiently.

PaaS, or Platform as a Service, while also focused on application development, generally provides a broader platform that includes operating systems, middleware, and development tools, making it more versatile but less specialized than CaaS for container-specific applications. IAAS, or Infrastructure as a Service, offers virtualized computing resources over the internet, allowing users to manage infrastructure. SAAS, or Software as a Service, delivers software applications over the internet, meaning users don’t have to manage the underlying infrastructure or platform.

CaaS stands out for its focus on containerized application development and management, making it the most appropriate answer to the question.