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: Anatomy
[{'content': 'Muscle which broadens and flattens the tongue: \nSelect and explain. \nA. Superior longitudinal, B. Inferior longitudinal, C. Verticalis., D. Transverse.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]