What is the function of Docker Compose?

Docker Compose is a tool specifically designed to define and manage multi-container applications seamlessly. It allows developers to use a YAML file to configure the services, networks, and volumes required by their applications. This configuration is particularly useful when an application consists of multiple interacting services, as it facilitates launching all these services together with a single command.

By using Docker Compose, users can more easily manage dependencies, scale services, and orchestrate the entire application stack in a consistent manner across different environments. Instead of managing each container individually, Docker Compose simplifies the process of handling multiple containers that may need to work in concert, streamlining the development and deployment process of complex applications.

While creating Docker images, managing containers, and configuring networking are all crucial aspects of working with Docker, the primary and unique function of Docker Compose lies in its ability to define and run applications made up of multiple containers, making option C the best choice.