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
[{'content': 'Endotoxic shock is initiated by: \nSelect and explain. \nA. Peripheral vasodilation, B. Injury to endothelial cells, C. Inadequate blood volume, D. Failure of myocardial pump', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]