This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Steering wheel injury on chest of a young man reveals multiple fractures of ribs and paradoxical movement with severe respiratory distress. X-ray shows pulmonary contusion on right side without pneumothorax. What is the initial treatment of choice? 
Select and explain. 
A. Immediate internal fixation, B. Endotracheal intubation and mechanical ventilation, C. Thoracic epidural analgesia and O2 therapy, D. Stabilization with towel clips
B: Endotracheal intubation and mechanical ventilation
Answer: B: Endotracheal intubation and mechanical ventilation 
Explanation: None