A nurse is preparing to administer insulin to a client who has type 1 diabetes mellitus. Which of the following types of prevention is the nurse demonstrating?

A) Secondary: Secondary prevention involves early detection and intervention to manage or treat a disease in its early stages, such as screening for diabetes or monitoring blood glucose levels. Administering insulin does not fall under this category, as it is not about early detection but rather ongoing management. B) Quaternary: Quaternary prevention focuses on minimizing the harm of medical interventions, avoiding overmedicalization, and improving the quality of life. This type of prevention is more about avoiding unnecessary treatments and ensuring the patient receives appropriate care. Administering insulin is not related to this concept. C) Tertiary: Tertiary prevention aims to manage and mitigate the effects of an established disease to improve the quality of life and reduce complications. Administering insulin to a client with type 1 diabetes mellitus is an example of tertiary prevention because it is part of managing and treating the chronic condition to prevent complications and maintain health. D) Primary: Primary prevention focuses on preventing the onset of disease through measures such as vaccination, lifestyle changes, or avoiding risk factors. Administering insulin does not prevent the onset of type 1 diabetes but rather manages an existing condition.