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: Medicine
Causes of Hiccups are 
Select and explain. 
A. Gastric distention, B. Alcohol ingestion, C. Sudden temperature changes, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Other causes: Excitement, stress.