You wish to show only the 1- Critical priority incidents for ITIL users viewing the dashboard. Select the required breakdown source configuration.

The chosen answer is the most appropriate because it focuses on a whitelist security type combined with a specific role (ITIL) and the desired incident priority level (1-Critical).

In this context, using a whitelist means that you are explicitly allowing access only to certain roles—in this case, ITIL users. By configuring the dashboard to show only the "1-Critical" incidents for those users, it ensures that critical incidents are transparently visible to the relevant personnel without cluttering the view with other priorities. This targeted visibility is essential in ITIL practice as it aims to minimize potential disruption by addressing the most critical incidents promptly.

The breakdown also specifies "Elements: 1-Critical," which aligns perfectly with the requirement of showing only incidents of this priority level. Hence, this combination effectively meets the intention of the question by ensuring that only ITIL users can view the most urgent incidents, facilitating a focused approach to incident management.