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': 'Edema occurs due to: \nSelect and explain. \nA. Increased capillary permeability, B. Decreased capillary permeability, C. Decreased interstitial fluid, D. Decreased blood flow', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]