Correct Answer: A

Rationale: Administering immunizations is a primary prevention strategy aimed at preventing diseases before they occur. By administering immunizations, the nurse helps individuals develop immunity against specific diseases, reducing the likelihood of them getting sick in the first place. This proactive approach aligns with primary prevention efforts to promote health and prevent illnesses.

Correct Answer: B

Rationale: The correct answer is B because community health nursing focuses on improving the health of the entire community rather than just individuals or families. By addressing health issues at the population level, community health nurses work towards enhancing the overall well-being and health outcomes of the community.

Correct Answer: C

Rationale: Advocating for health policy changes is a significant action that can impact the health of a community on a larger scale by influencing policies that affect the well-being of the population. While providing health education and conducting community assessments are valuable activities, advocating for policy changes can lead to systemic improvements in healthcare access, quality, and outcomes.

Correct Answer: D

Rationale: Tracheostomy is a surgical procedure where an incision is made in the windpipe to help with breathing. Acute respiratory failure, which can occur due to various reasons such as upper airway obstruction, is a common indication for tracheostomy. While drainage of pleural effusion, hemorrhage, and infections may require medical intervention, they are not direct indications for a tracheostomy like acute respiratory failure.

Correct Answer: B

Rationale: During secondary prevention, healthcare professionals focus on providing early treatment for disease to prevent its progression or complications. Health screenings fall under the realm of primary prevention by detecting diseases early or identifying risk factors before they lead to illness.