Who is informed of an unrestricted report of sexual assault?

The correct choice highlights that personnel who have a legitimate need to know are informed about an unrestricted report of sexual assault. In cases of unrestricted reporting, the intent is to ensure that the appropriate authorities, such as the chain of command and law enforcement, can take necessary action while still respecting the confidentiality of the victim as much as possible. This approach is designed to balance the victim's need for support and the military's obligation to address the incident and facilitate a thorough investigation.

In contrast, simply informing all personnel on base or only the Soldier's family would violate the privacy and safety of the victim and could deter future reports of assault. Confidentiality is essential in encouraging victims to come forward, but unrestricted reporting does not mean that no one is informed—it ensures that only those involved in the process who are necessary for support and investigation are made aware.