You are answering a USMLE-style medical question. Question: A 2-month-old infant is brought to the emergency department by her mother due to a fall. Tearfully, the patient’s mother describes witnessing her child fall from the changing table. The patient was born prematurely at 36 weeks estimated gestational age via vacuum-assisted vaginal delivery. The patient is afebrile. Her vital signs include: blood pressure of 94/60 mm Hg, pulse 200/min, and respiratory rate 70/min. Physical examination reveals a subconjunctival hemorrhage in the left eye and multiple bruises on the chest and back. Which of the following is the best initial step in management of this patient’s condition? Options: A) CT scan of the head B) Involvement of social services C) Family counseling D) Rule out medical conditions Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.