A 2-month-old infant is brought to the emergency room. Which factor should lead the RN to suspect that the child may have experienced abusive head trauma?

The correct answer is D: Retinal hemorrhage. Abusive head trauma often presents with retinal hemorrhages due to violent shaking or impact. This is a key sign seen in infants with abusive head trauma. Large bruises on the body (choice A) could be due to accidental trauma. A laceration to the forearm (choice B) is not specific to abusive head trauma. Sunken fontanels (choice C) may indicate dehydration. The presence of retinal hemorrhage (choice D) is a significant indicator of possible abusive head trauma in infants.