This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'When the confidence level of a test is increased which of the following will happen- \nSelect and explain. \nA. No effect on significance, B. Previously insignificant value becomes significant, C. Previously significant value becomes significant, D. No change in hypothesis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]