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: Pathology
[{'content': 'Chronic subdural hematoma is caused by - \nSelect and explain. \nA. Rupture of bridging veins, B. Fracture skull bones, C. Subarachnoid hemorrhage, D. Hypertension', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]