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