A nurse is providing teaching to students about physical and psychosocial effects of stress to school-aged children. Which of the following levels of prevention does this demonstrate?

A. Secondary prevention involves early detection and prompt intervention in health issues that have already occurred; providing education about stress does not fall under this category. B. Suicide prevention is a specific aspect of mental health care and is not directly related to general stress education. C. Primary prevention aims to prevent the onset of health issues and promote health and well-being, making the education on stress and its effects a form of primary prevention. D. Tertiary prevention focuses on rehabilitation and management of existing diseases, which does not apply to teaching about stress effects.