This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': "Which one of the following is not considered for screening? \nSelect and explain. \nA. Disease burden, B. Physician's knowledge of the disease, C. Cost of the test, D. Treatment efficacy", 'role': 'user'}, {'content': 'Answer: C \nExplanation: .screening differs from periodic health examinattion,in the following respects that 1.capable of wide application 2.relatively inepensive. 3.reqires little physician time,only required to interpret the results. ref:park&;s textbook,ed 22,pg no 127', 'role': 'assistant'}]