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
Months or years following radiotherapy, the irradiated oral mucosa 
Select and explain. 
A. Undergoes necrosis, B. Develops candidiasis, C. Becomes atrophic, D. Develops granulomatosis
C: Becomes atrophic
Answer: C: Becomes atrophic 
Explanation: None