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': 'A pt presents with acute rheumatic carditis with fever. True statements is - \nSelect and explain. \nA. Increase troponin T, B. Reduced myocardial contractility, C. Signs of inflammation and necrosis, D. Valve replacement will ameliorate C.C.F.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]