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
Intensifying screen is used in extraoral radiograph to: 
Select and explain. 
A. Decrease radiation to patient, B. Increase contrast, C. Decrease contrast, D. Collimation
A: Decrease radiation to patient
Answer: A: Decrease radiation to patient 
Explanation: None