Final answer:
The FBI handles federal crimes and national security issues, not typical complaints such as product safety or labeling, which fall under the FDA. Local police deal with criminal issues, and the CDC handles public health concerns. Without more details about the complaint, it's not possible to select the FBI agents as the correct group to contact for a complaint.
Step-by-step explanation:
When dealing with complaints, the appropriate agency to call depends on the nature of the complaint. While the FBI (Federal Bureau of Investigation) handles a broad range of federal crimes and issues related to national security, they are not typically the first point of contact for most complaints.
For instance, if you have a complaint regarding a product's safety, efficacy, or labeling, the FDA (Food and Drug Administration) would be the relevant agency. They frequently collaborate with other federal agencies and government levels, including local and state agencies, for regulatory inspections and enforcement actions.
On the other hand, local police are commonly the first responders to local criminal issues or emergencies. And for health-related issues such as disease outbreaks or public health concerns, you might reach out to the CDC (Centers for Disease Control and Prevention).
Given the context, without more details about the nature of the complaint, it's difficult to definitively decide which group to call. However, based on the information provided, if a complaint falls under a jurisdiction that is not related to criminal investigations or national security, such as requiring regulatory inspections, the FBI would not be the typical contact agency—so the answer would not be 'a. FBI Agents.'