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: Social & Preventive Medicine
[{'content': 'In selecting a screening test for a disease which of the following should not be considered? \nSelect and explain. \nA. Cost of the test, B. Efficacy of the treatment, C. Knowledge of the physician about the disease, D. Sufferings from disease to the people', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]