The correct attribute/value pair to successfully extract the timestamp from the provided events is TIME_FORMAT = %b %d %H:%M:%S. This format corresponds to the structure of the timestamps in the provided data:
* %b represents the abbreviated month name (e.g., Sep).
* %d represents the day of the month.
* %H:%M:%S represents the time in hours, minutes, and seconds.
This format will correctly extract timestamps like "Sep 12 06:11:58".
Splunk Documentation Reference: Configure Timestamp Recognition

In Splunk, it's considered best practice to create small, single-purpose deployment apps rather than large, multi-purpose ones. This approach ensures better manageability, easier updates, and clearer version control.
Option D, which suggests creating large, multi-purpose deployment apps, is not a best practice.
Splunk Documentation Reference: Deployment Server Best Practices

In Splunk Cloud, when an app on Splunkbase indicates "Request Install," it means that the app is not available for direct self-service installation and requires intervention from Splunk Support. This could be because the app needs to undergo an additional review for compatibility with the managed cloud environment or because it requires special installation procedures.
In these cases, customers need to contact Splunk Support to request the installation of the app. Support will ensure that the app is properly vetted and compatible with Splunk Cloud before proceeding with the installation.
Splunk Cloud Reference:For further details, consult Splunk's guidelines on requesting app installations in Splunk Cloud and the processes involved in reviewing and approving apps for use in the cloud environment.
Source:
* Splunk Docs: Install apps in Splunk Cloud Platform
* Splunkbase: App request procedures for Splunk Cloud