Correct Answer: D

Rationale: The correct answer is D because participating in contact sports can increase the risk of injury and bleeding in a client receiving warfarin therapy. Warfarin is a blood thinner, and activities with a higher risk of injury should be avoided to prevent bleeding complications. Choices A, B, and C are all correct statements for a client on warfarin therapy. Avoiding foods high in vitamin K helps maintain consistent anticoagulation levels, using a soft toothbrush and an electric razor reduces the risk of bleeding gums and cuts, and keeping appointments for blood tests ensures proper monitoring of the client's international normalized ratio (INR) levels.

Correct Answer: D

Rationale: The correct answer is D: number of people without access to healthcare. Ensuring access to healthcare is fundamental to addressing a wide range of health issues and is a priority for improving overall community health. Option A, overuse of diagnostic technology, though important, is not the highest priority when considering basic access to healthcare. Option B, government-based health insurance, is relevant but may not directly address the issue of lack of access for all individuals. Option C, neonatal and infant mortality rates, is crucial but addressing access to healthcare for all individuals is a more immediate and foundational concern for the community health project.

Correct Answer: A

Rationale: The correct answer is A: Improved academic performance. Physical activity has been shown to improve academic performance by enhancing concentration and cognitive function. This benefit is particularly important for elementary school students who are developing foundational skills. Choice B, increased social interactions, while important for overall development, may not directly relate to the academic aspect that the nurse is focusing on. Choice C, enhanced physical strength, is a valid benefit of physical activity but may not be as relevant to academic performance as the ability to concentrate and learn. Choice D, better sleep patterns, is also a valuable outcome of physical activity but is not as directly linked to academic performance as improved cognitive function.

Correct Answer: C

Rationale: The correct action for the charge nurse to take is to obtain written authorization from clients to release the information. This step is crucial to ensure compliance with privacy laws and ethical standards. Asking for permission from the research committee (Choice A) may not address the individual clients' rights to privacy. Asking the student to sign a standard waiver form (Choice B) is not appropriate, as the authorization should come from the clients themselves. Providing the information for research purposes only (Choice D) without proper authorization violates client confidentiality and privacy.

Correct Answer: B

Rationale: The correct answer is B. A decrease in firearms retrieved on school property is a positive indication that the Healthy People 2020 objectives are being addressed. This finding suggests progress in reducing violence and improving safety in schools, which aligns with the goals of promoting overall health and safety among adolescents. Choices A, C, and D do not directly relate to the Healthy People 2020 objectives. Increased absenteeism, higher requests for pregnancy testing, and a decline in student enrollment do not necessarily reflect the specific health and safety goals outlined in Healthy People 2020.