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
The actions of pure gastrin includes 
Select and explain. 
A. Stimulation of pepsin secretion, B. Stimulation of gastric motility, C. Increased flow of hepatic bile, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None