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: Radiology
[{'content': 'Advantage of digital radiography is/are: \nSelect and explain. \nA. Direct display of the image, B. Less patient exposure, C. Elimination of the need of dark room, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Digital Radiography:', 'role': 'assistant'}]