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
[{'content': 'The actions of pure gastrin includes \nSelect and explain. \nA. Stimulation of pepsin secretion, B. Stimulation of gastric motility, C. Increased flow of hepatic bile, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]