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
The aim of preventing reflux oesophagitis by repairing hiatus hernia is achieved by 
Select and explain. 
A. Bringing the stomach inferior to diaphragm, B. Reconstitution of the angle of Hill, C. Repair of defect in diaphragm, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None