Which imaging finding is characteristic of Laryngotracheobronchitis (Croup), and what is the recommended treatment?
A) Steeple sign on lateral neck X-ray, Racemic epinephrine and oxygen therapy
B) Thumbprint sign on chest X-ray, Intravenous fluids and antibiotics
C) Butterfly sign on CT scan, Surgical intervention and mechanical ventilation
D) Target sign on abdominal ultrasound, Appendectomy and analgesics