A nurse is preparing a client for a colonoscopy. The client has a family history of colon cancer. Which of the following types of prevention is the nurse demonstrating?

Choice A reason: Quaternary prevention avoids over-medicalization, reducing unnecessary interventions. It focuses on minimizing harm from excessive testing or treatment, not screening procedures like colonoscopy, which targets early disease detection in at-risk individuals, such as those with a family history of colon cancer. Choice B reason: Tertiary prevention manages existing diseases to prevent complications (e.g., rehabilitation after a stroke). Colonoscopy screens for early colon cancer or polyps in asymptomatic individuals, not managing an existing condition, making it a preventive screening rather than a tertiary intervention for disease management. Choice C reason: Primary prevention prevents disease onset through measures like vaccinations or lifestyle changes. Colonoscopy detects existing abnormalities (e.g., polyps) in at-risk individuals, not preventing cancer initiation but identifying it early, aligning with screening rather than primary prevention strategies like diet modification. Choice D reason: Secondary prevention involves early detection of diseases in asymptomatic individuals, such as colonoscopy for colon cancer screening. In those with a family history, it identifies precancerous polyps or early cancers, enabling timely intervention to prevent progression, aligning with screening goals for high-risk populations.