Researchers have developed a blood test to screen for early signs of prostate cancer. The test detects protein, prostate-specific antigen (PSA), that is produced by the prostate in greater amounts when cancer is present. Testing for PSA can detect prostate cancer in the earliest stages in men who show no symptoms, but the diagnosis must be confirmed by additional tests due to a high rate of false positives. Recently, however, the National Health Organization recommended against PSA screening of men over 75. This group would probably not benefit, since __________.
(A) many men over 75 have already been diagnosed with prostate cancer
(B) the additional tests required to confirm the diagnosis are especially taxing on men over 75
(C) even if early signs are present, men over 75 who display no symptoms of prostate cancer are unlikely ever to do so
(D) the fact that PSA is present in the body does not itself strongly suggest that prostate cancer is present
(E) testing for PSA, along with necessary follow-up tests, is very expensive, and many men over 75 do not have private health insurance
[spoiler]OA:C[/spoiler]
(A) many men over 75 have already been diagnosed with prostate cancer
(B) the additional tests required to confirm the diagnosis are especially taxing on men over 75
(C) even if early signs are present, men over 75 who display no symptoms of prostate cancer are unlikely ever to do so
(D) the fact that PSA is present in the body does not itself strongly suggest that prostate cancer is present
(E) testing for PSA, along with necessary follow-up tests, is very expensive, and many men over 75 do not have private health insurance
[spoiler]OA:C[/spoiler]
