The three components of the Intervention Wheel are:

• A. Communities, systems, and individuals/families.
• B. Interventions, color wedges, and levels of practice.
• C. Population base, levels of practice, and public health interventions.
• D. Populations at risk, populations of interest, and levels of practice.

Answer: (C)

The three components being tested are the population-based focus, the levels of practice, and the public health interventions. The Intervention Wheel rests on a population-based approach, meaning the focus is on groups and communities rather than only individuals. It also defines three levels of practice where nursing actions occur: individual/family, community, and systems. Finally, it specifies the public health interventions, which are the 17 actions nurses use to improve population health.

So the correct trio—population base, levels of practice, and public health interventions—captures how the Wheel organizes both the focus, the setting, and the actions. The other options describe aspects of the Wheel’s design or targets but do not identify its three core components.