Correct Answer: A

Rationale: A fistula typically has fewer complications, allows for greater freedom of movement, and involves natural vessel changes that improve dialysis efficiency. However, it is not ready for immediate use, which is why it may take weeks to mature before it can be used.

Correct Answer: A

Rationale: It is important for the nurse to provide the parents with accurate information so they can confidently explain the situation to others, helping to reduce stress and misinformation. Avoiding family and friends or minimizing the problem is not helpful.

Correct Answer: B

Rationale: The correct answer is B. Children with type 1 diabetes require insulin replacement because their pancreas produces little or no insulin. Oral hypoglycemics used in type 2 diabetes work by improving the effectiveness of insulin the body already makes, which is not sufficient in type 1 diabetes. Choice A is incorrect because the issue is not about the pancreas being adult or child-specific but rather the type of diabetes. Choice C is incorrect because it misstates the mechanism of action of the medications. Choice D is incorrect because it provides inaccurate information about the potential for the child's pancreas to produce insulin in the future, which is unlikely in type 1 diabetes.

Correct Answer: A

Rationale: Corrected Rationale: Beta Thalassemia is most common in individuals of Mediterranean descent, such as those from Italy, Greece, and the Middle East. This genetic disorder affects hemoglobin production and can lead to severe anemia. Choice A is the correct answer as individuals of Mediterranean descent are at the highest risk for Beta Thalassemia. Choices B, C, and D are incorrect as they do not belong to the population group most at risk for this genetic disorder.

Correct Answer: B

Rationale: A sunken fontanel is a classic sign of dehydration in infants, indicating a fluid volume deficit. In dehydration, the fontanel sinks due to decreased fluid volume in the body. Increased blood pressure (Choice A) is not typically associated with dehydration in infants. Decreased pulse rate (Choice C) is not a common finding in fluid volume deficit, as the body tries to increase the heart rate to compensate for decreased volume. Low urine specific gravity (Choice D) may be seen in dehydration, but it is not as specific or as easily observable as a sunken fontanel.