The main purpose of outbreak investigation is to:

Correct Answer: A

Rationale: The primary goal of outbreak investigation is to identify the source and implement control measures to halt the outbreak, rather than assigning blame (B), training workers (C), or prioritizing infrastructure (D), though these may be secondary benefits.

Correct Answer: A

Rationale: The correct answer is A: Giving care with a focus on the aggregate's needs. Community health nursing emphasizes population-based care, addressing the health needs of entire communities rather than individual clients. This approach involves assessing and addressing the health concerns, risks, and resources of the community as a whole. By targeting the aggregate, interventions can have a broader impact on improving health outcomes for the entire population. Choice B is incorrect because it focuses on the needs of a specific group within the community, rather than the community as a whole. Choice C is incorrect as it pertains to individual client care, which is more aligned with traditional nursing practice. Choice D is incorrect as it suggests a personalized approach to care, rather than the population-based focus of community health nursing.

Correct Answer: C

Rationale: The correct answer is C, improved sanitation and other public health activities. This is because advancements in public health measures, such as clean water supply, waste disposal, and vaccination programs, have played a crucial role in reducing infectious diseases and improving overall population health. In contrast, options A and B focus on medical interventions rather than public health initiatives. Option D, increased use of antibiotics, is also important but alone cannot account for the significant increase in life expectancy since the early 1900s.

Correct Answer: A

Rationale: The correct answer is A: Health status indicators. This is because health status indicators, such as life expectancy, mortality rates, and disease incidence, provide quantitative measures of the overall health of a population. These indicators are used to assess the effectiveness of healthcare interventions, identify health disparities, and prioritize public health initiatives. Choice B, levels of prevention, refers to primary, secondary, and tertiary prevention strategies and is not a direct measurement of population health. Choice C, the number of memberships at a fitness center, is not a comprehensive or standardized measure of population health. Choice D, reported provincial alcohol and tobacco sales, may provide insights into specific health behaviors but do not represent overall population health status.

Correct Answer: B

Rationale: The correct answer is B because acting as a member of a community action group for accessible transit choices aligns with the advocate role of a community health nurse. This role involves promoting policies and initiatives that address community health needs. Organizing home care support (A) focuses on direct patient care, prenatal assessments (C) are clinical tasks, and facilitating a self-help group (D) is more related to counseling and education, not advocacy.