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
Chronic subdural hematoma is caused by - 
Select and explain. 
A. Rupture of bridging veins, B. Fracture skull bones, C. Subarachnoid hemorrhage, D. Hypertension
A: Rupture of bridging veins
Answer: A: Rupture of bridging veins 
Explanation: None