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
Patient's cross-infection with sensor, in digital radiography/RVG is prevented by 
Select and explain. 
A. Cover with autoclaved cloth with each use, B. Wipe with ethyl alcohol in each patient, C. Clean with 5.25% sodium hypochlorite in each patient, D. Cover with impervious barrier
D: Cover with impervious barrier
Answer: D: Cover with impervious barrier 
Explanation: None