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': 'Early gastric cancer generally indicates - \nSelect and explain. \nA. Gastric adencarcinoma detected early, B. Gastric adenocarcinoma confined to the mucosa, C. Gastric adenocarcinoma confined to the mucosa & submucosa, D. Gastric adenocarcinoma less than 1 cm. In size', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]