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': 'Thermoregulatory response activated by cold is \nSelect and explain. \nA. Cutaneous vasodilatation, B. Anorexia, C. Increased voluntary activity, D. Increased respiration', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]