Final answer:
The command to list all running swarms in your configuration is 'docker swarm ls'.
Step-by-step explanation:
The command to list all running swarms in your configuration is docker swarm ls. This command provides a list of Docker swarms that are currently running on your system.
Docker swarm ls is used to check the status of Docker swarms and see if they are running, paused, or stopped.
Therefore, the correct answer is a) docker swarm ls.