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
Digital radiography requires less radiation than conventional radiography because: 
Select and explain. 
A. The sensor is larger., B. The sensor is more sensitive to x-rays., C. The exposure time is increased., D. All of the above.
B: The sensor is more sensitive to x-rays.
Answer: B: The sensor is more sensitive to x-rays. 
Explanation: Digital radiography utilizes sensor which is more sensitive to X-rays than conventional film.