Final answer:
The correct command to list Docker networks is 'docker network ls'. This command displays all networks managed by Docker along with their details such as ID and name.
Step-by-step explanation:
The command to list all available Docker networks in your system or swarm cluster is C) docker network ls. This command provides a list of all networks that Docker is managing.
For each network, it shows details like the network ID, name, and driver. If you need more information about a specific network, you can use the docker network inspect command, followed by the network's name or ID.