question: Q:A 36-year-old female presents to clinic inquiring about the meaning of a previous negative test result from a new HIV screening test. The efficacy of this new screening test for HIV has been assessed by comparison against existing gold standard detection of HIV RNA via PCR. The study includes 1000 patients, with 850 HIV-negative patients (by PCR) receiving a negative test result, 30 HIV-negative patients receiving a positive test result, 100 HIV positive patients receiving a positive test result, and 20 HIV positive patients receiving a negative test result. Which of the following is most likely to increase the negative predictive value for this test?? 
  {'A': 'Increased prevalence of HIV in the tested population', 'B': 'Decreased prevalence of HIV in the tested population', 'C': 'Increased number of false positive test results', 'D': 'Increased number of false negative test results', 'E': 'Decreased number of false positive test results'},