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: Pathology
The etiology of angioedema is: 
Select and explain. 
A. a)	Sensitivity to acrylic resin, B. b)	Using ACE inhibitors, C. c)	Hereditary, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None