This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Which of the following is an example of learned tolerance? \nSelect and explain. \nA. avoiding alcohol when feeling unsteady, B. drinking alcohol only with food, C. walking a straight line when intoxicated, D. not driving when drunk', 'role': 'user'}, {'content': "Answer: C \nExplanation: Learned tolerance refers to the reduction of the effect of a drug due to compensatory mechanisms that are learned. An example is walking a straight line despite the motor impairment caused by alcohol. This likely represents both acquisition of motor skills and the learned awareness of one's deficit; thus the person walks more carefully.", 'role': 'assistant'}]