A nurse is caring for an infant who has rotavirus. Which of the following findings indicates that the infant is moderately dehydrated?

The correct answer is C: Weight loss 7%. Moderate dehydration is typically indicated by a weight loss of around 5-10%. In infants, weight loss is a more reliable indicator of dehydration as compared to other signs like capillary refill or bradycardia. Respiratory rate and capillary refill time can be influenced by factors other than dehydration, while bradycardia is not a consistent finding in moderate dehydration. Weight loss directly reflects fluid loss and is a key parameter to assess dehydration in infants.