What does the 'az iot hub configuration show-metric' command return?

The 'az iot hub configuration show-metric' command is designed to provide immediate feedback on the current configuration metrics related to an Azure IoT Hub. When you execute this command, it delivers real-time information about the status of the configuration across the devices connected to the IoT Hub.

This immediate response is important for developers and administrators working with IoT solutions, as it allows them to quickly assess whether the configurations applied to devices were successful or if there are any ongoing issues that need to be addressed. The ability to obtain current status information helps in managing and monitoring devices effectively within the IoT ecosystem.

In contrast, some of the other choices imply a longer wait time for feedback or focus solely on error logs, which do not accurately represent the functionality of this command. The command is meant to reflect the current metrics, rather than waiting for a configuration to propagate to all devices or only providing error details. Ultimately, this makes option B the most accurate representation of the command's behavior.