Correct Answer: D

Rationale: In diabetes insipidus, the body loses excessive amounts of water, leading to diluted urine with low specific gravity. Therefore, when the urine specific gravity is within the normal range, it indicates that the kidneys are properly concentrating urine, which is a sign of effective treatment for diabetes insipidus. Choices A, B, and C are incorrect because in diabetes insipidus, there is polyuria (excessive urination), persistent thirst due to fluid loss, and potential weight loss due to fluid imbalance, so these findings would not indicate effective treatment.

Correct Answer: B

Rationale: Fall prevention should be prioritized for older adults as falls are a significant cause of injury and hospitalization in this population. Addressing fall prevention measures can help reduce the risk of falls and improve the overall safety and well-being of older adults. Medication management, fire safety, and emergency preparedness are also important topics, but fall prevention takes precedence due to its direct impact on the health and safety of older adults.

Correct Answer: C

Rationale: The correct answer is C. Sudden, severe abdominal pain can indicate a perforated ulcer, which is a medical emergency requiring immediate intervention. Epigastric tenderness (choice A) may be expected in a client with peptic ulcer disease but does not necessarily require immediate intervention. Hypoactive bowel sounds (choice B) are concerning but not as urgent as sudden, severe abdominal pain. Hyperactive bowel sounds (choice D) are more indicative of conditions like gastroenteritis rather than a perforated ulcer, making it a less critical finding compared to sudden, severe abdominal pain.

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: B

Rationale: A nurse with Marfan syndrome who is postmenopausal can safely care for the client because Marfan syndrome does not affect the ability to care for this client, and postmenopausal status minimizes the risk of radiation exposure affecting reproductive health. Choice A is incorrect because pregnancy increases the risk of radiation exposure to the fetus. Choice C is incorrect because a nurse with a cold may have a compromised immune system and should not be exposed to radiation therapy. Choice D is incorrect because lactation can increase the risk of radiation exposure to breast tissue.