What is the effect of using the `--rm` flag when running a Docker container?

Using the --rm flag when running a Docker container ensures that the container is automatically removed from the system after it exits. This is particularly useful for one-time or short-lived containers, as it helps keep the environment clean and prevents the accumulation of stopped containers that would otherwise need to be manually cleaned up later.

This automatic removal feature saves system resources and simplifies the management of container lifecycles, allowing users to focus on active containers without needing to manage the leftovers of containers that are no longer in use. It's a popular practice when containers are expected to perform a task and then terminate without needing to retain any state or configuration.

Other options, such as automatic rebooting of the container, saving logs, or pausing on exit, do not accurately describe the behavior influenced by the --rm flag. This flag specifically addresses the deletion of the container post-execution, affirming the correct choice provided.