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: Pharmacology
[{'content': 'Entacapone is an anti–Parkinsonism drug. It acts by : \nSelect and explain. \nA. Agonism at dopamine receptors, B. Antagonism at dopamine receptors, C. Monoamine oxidase inhibition, D. Cathecol–o–methyl transferase inhibition.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]