Correct Answer: BTo gain better insight into the Google Cloud environment and monitor unexpected firewall changes and instance creation, using Cloud Logging filters to create log-based metrics is a simple and effective solution. This approach involves native Google Cloud services, making it easier to set up and manage compared to alternatives that require additional installations or complex configurations. Once the log-based metrics are set up, you can monitor the changes and set up alerts for any unexpected activities, ensuring timely responses to security incidents.