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

The correct answer focuses on using a blacklist configuration to control data visibility for ITIL users viewing the dashboard. By configuring the security type as a blacklist with the roles specified as ITIL and including the element "1 - Critical," this effectively means that any incidents categorized as "1 - Critical" will be hidden from ITIL users.

This approach is effective in scenarios where you need to restrict access to specific high-priority data for certain user roles, while still allowing them to view other priority incidents. This ensures that ITIL users do not get overwhelmed or disrupted by critical incidents, which may be better managed by specialized teams, while still retaining access to lower-priority incidents that they may be required to handle or monitor.

In contrast, whitelisting configurations would allow users to see only the incidents explicitly listed, and thus wouldn’t serve the purpose of hiding "1 - Critical" incidents as intended. The use of blacklists is particularly aligned with the goal of exclusion, making it the most appropriate choice for this scenario.