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: Surgery
Complications of "reflux esophagitis" 
Select and explain. 
A. Stricture, B. Schatzki's ring, C. Barrett's esophagus, D. All of above
D: All of above
Answer: D: All of above 
Explanation: None