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
[{'content': 'Helicobacter pylori is a causative agent for which of the following conditions? \nSelect and explain. \nA. MALT, B. Gastric adenocarcinoma, C. Ulcers, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]