Which agency may be contacted by the department if they cannot locate the subject of a child abuse report?

The correct answer is the agency that has specific authority and resources related to child welfare issues, making it the most appropriate point of contact for assistance in locating the subject of a child abuse report. Child Protective Services (CPS) is specialized in handling cases of child abuse and neglect. They have the expertise and legal authority to intervene in such situations and can coordinate with law enforcement to locate individuals involved in these reports, ensuring the safety and well-being of the child.

The other agencies mentioned do not have the same specific focus or resources for dealing with child abuse cases. The FBI primarily handles federal crimes and may not be involved in local child welfare cases unless federal violations are indicated. The Department of Public Safety (DPS) generally focuses on state law enforcement and public safety issues, rather than child welfare. The National Guard is a military organization that responds to national crises and emergencies, and their involvement in child welfare would be quite limited. Thus, CPS stands out as the most qualified agency for such matters.