Community health nursing applies epidemiological, preventive, population-based, systematic strategies to identify health disparities. Comprehensive assessment analyzes demographic data, morbidity rates, and risk factors to guide evidence-based planning, ensuring interventions address root causes and maximize long-term population health outcomes. Rationale: A. Performing a community assessment and developing a plan establishes a systematic foundation for population health improvement. A comprehensive assessment identifies priority needs, while structured planning ensures interventions target high-risk groups. This approach maximizes resource allocation efficiency. It enables sustainable, evidence-based community interventions. B. Ensuring all homes have a smoke detector is a specific safety intervention addressing fire-related injury prevention. While beneficial, it targets a single risk factor. It lacks comprehensive scope. This intervention is limited compared to broad population assessment strategies guiding multiple health priorities. C. Providing transportation for medically fragile clients improves access to healthcare services. This addresses an important barrier but benefits a limited subgroup. It does not address wider determinants of health. This service is reactive rather than proactive in community health planning. D. Monitoring health conditions for environmental exposures identifies potential risks such as toxins or pollutants. However, it focuses on surveillance rather than comprehensive intervention. It lacks planning integration. This monitoring activity alone does not achieve broad impact without assessment-driven strategy.