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: Dental
[{'content': 'Bahaviour\tmanagement\ttechiques\twere\tLabeled\tas\n"Embarrassment of riches" in 1977 by - \nSelect and explain. \nA. Jimmy R.Pinkham, B. Gerald Z.Wright, C. David W.Chambers, D. J.C. Brauer', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]