In Microsoft Sentinel, roles define access based on least privilege.
To investigate incidents, a user needs permissions to view incidents, alerts, entities, and evidence, and to perform investigation actions (like assigning, commenting, or changing incident status).
Microsoft defines the Microsoft Sentinel Responder role as:
"Allows users to view incidents, assign incidents to themselves or others, change incident severity and status, and run playbooks." This is the minimal role required for incident investigation.
* Reader: Can view data but cannot act on incidents.
* Responder #: Can investigate and respond.
* Contributor: Can create and edit rules, analytics, and automation (more privileges than required).
* Automation Contributor: Used for playbook automation, not investigation.
# answer: A. Microsoft Sentinel Responder