input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A screening test is used in the same way in two similar populations but the proportion of false positive results in population A is lower than that in population B. what is the likely explanation?   (A) The specificity of the test is lower in population A   (B) The prevalence of the disease is lower in population A   (C) The prevalence of the disease is higher in population A   (D) The specificity of test is higher in population A
output: ['(C) The prevalence of the disease is higher in population A <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) The specificity of the test is lower in population A  (B) The prevalence of the disease is lower in population A  (C) The prevalence of the disease is higher in population A  (D) The specificity of test is higher in population A <> possible answers', '  A screening test is used in the same way in two similar populations but the proportion of false positive results in population A is lower than that in population B. what is the likely explanation? <> context']