Correct Answer: A

Rationale: The correct answer is A: 'Eliminate areas of standing water.' Standing water provides breeding grounds for mosquitoes, which spread West Nile virus. By eliminating standing water, individuals can reduce the risk of mosquito breeding and the transmission of the virus. Choices B, C, and D are incorrect. Wearing a mask when outdoors, ensuring food is cooked thoroughly, and avoiding contact with sick individuals are not directly related to primary prevention strategies for West Nile virus.

Correct Answer: C

Rationale: The correct answer is C: 'Lowered immune system function.' As individuals age, their immune system tends to weaken, making them more susceptible to infections. Choices A, B, and D are incorrect because improved circulation and increased immune function would typically reduce the risk of infections, while dehydration can impact overall health but is not directly related to immune system function in the context of infection risk.

Correct Answer: C

Rationale: The correct answer is C because sucralfate should be taken on an empty stomach, 1 hour before meals, and at bedtime to coat the ulcer and protect it from stomach acid. Choice A is incorrect because taking it with meals may reduce its effectiveness. Choice B is incorrect as it should not be taken right before bed. Choice D is incorrect as sucralfate should be taken regularly as prescribed, not just when symptoms occur.

Correct Answer: C

Rationale: The correct answer is C. QSEN focuses on quality improvement in healthcare. Tracking how soon patients are discharged after different types of surgeries helps in evaluating the quality of care provided and identifying areas for improvement. Choices A and B focus on monitoring outcomes but do not directly relate to quality improvement initiatives. Choice D is more about a routine assessment before discharge and does not involve a quality improvement process.

Correct Answer: A

Rationale: Corrected Rationale: Metoprolol is a beta-blocker commonly used to treat conditions like hypertension and angina. As a beta-blocker, it primarily affects the cardiovascular system by reducing heart rate and blood pressure. Therefore, the nurse should monitor the client's blood pressure regularly to assess the drug's effectiveness and ensure that it is within the therapeutic range. Monitoring liver function, serum potassium levels, or blood glucose is not typically required for clients taking metoprolol, as its primary impact is on the heart and blood vessels, making choice A the most appropriate monitoring parameter.