Final answer:
The default path for creating a deployment in Splunk is /opt/splunk/etc/deployment-apps, which is where deployment apps are stored for distribution to deployment clients.
Step-by-step explanation:
When running the command for creating a deployment in Splunk, the default path where the deployment is created would be /opt/splunk/etc/deployment-apps. This path is used by the deployment server in Splunk for storing deployment apps that are pushed to deployment clients.
While /opt/splunk/etc/apps is used for installations and configurations for the Splunk instance itself, and /opt/splunk/etc/system/local and /opt/splunk/etc/system/default are for system-wide local changes and default settings respectively, the deployment-apps directory is intended for configurations and apps meant to be distributed across multiple Splunk instances.