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
Advantage of digital radiography is/are: 
Select and explain. 
A. Direct display of the image, B. Less patient exposure, C. Elimination of the need of dark room, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Digital Radiography: