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
For better detection of an early lesion use: 
Select and explain. 
A. Low KVp, B. Low mA, C. Low exposure time, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: For better detection of an early lesion use:

Low KVp
Low mA
Low exposure time