A nurse is caring for a 3-year-old child who was admitted with acute diarrhea and dehydration. Which of the following findings indicates that oral rehydration therapy has been effective?

The correct answer is C: Urine specific gravity of 1.015 indicates effective oral rehydration therapy. A specific gravity of 1.015 is within the normal range for urine concentration, suggesting adequate hydration. A lower specific gravity indicates dilute urine, which is a sign of overhydration, while a higher specific gravity indicates concentrated urine, a sign of dehydration. Choices A and B are vital signs that are not directly indicative of hydration status. Choice D, capillary refill of greater than 3 seconds, is a sign of poor perfusion and dehydration.