What organization sets training guidelines for emergency services?

The correct answer is APCO (Association of Public-Safety Communications Officials) because this organization specifically focuses on the needs of public safety communications. APCO establishes comprehensive training standards and guidelines to enhance the effectiveness of public safety telecommunicators. They provide resources, educational programs, and training modules tailored to the unique challenges faced by those in emergency communications roles.

While other organizations may influence training in broader emergency management or specific services, such as firefighting or disaster management, APCO is particularly dedicated to the training and certification of individuals involved in public safety communications. This makes it the prominent choice for establishing training guidelines relevant to this field.