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
If you wanted to increase the penetrating quality of the x-ray beam, what machine setting(s) would you change? 
Select and explain. 
A. Increase exposure time, mA, and kVp, B. Increase the mA and the kVp, C. Increase the mA, D. Increase the kVp
D: Increase the kVp
Answer: D: Increase the kVp 
Explanation: None