The nurse is conducting a routine assessment of a 24-hour-old infant who was delivered vaginally. At birth the infant's weight was 5 pounds 5 ounces, heart rate was 150 beats/minute, respiratory rate was 59 breaths/minute, and the axillary temperature was 97.7 F. Which finding requires further assessment?

A. A 2 cm bluish purple area on the sacrum is likely a benign Mongolian spot, common in newborns and not a concern. B. Edema along the sagittal suture is common due to birth trauma and typically resolves without intervention. C. A respiratory rate of 59 breaths/minute is within the normal newborn range (30-60 breaths/minute). D. A weight loss of 10 ounces (approximately 283 grams) in 24 hours is significant in a newborn and requires further assessment, as newborns typically lose up to 7-10% of birth weight over several days, not within the first day alone. This may indicate dehydration or feeding issues.