medium · GMAT Verbal
After a region introduced mass screening for a slow-growing cancer, the share of diagnosed patients still alive five years after diagnosis rose sharply. Yet the number of residents who die from this cancer each year has not fallen at all. Screening detects many small tumors that would never have caused symptoms in a person's lifetime.
Which of the following is most strongly supported by these statements?
- The five-year survival figure rose at least partly because screening added cases that were never destined to be fatal.
- Screening for this slow-growing cancer ought to be discontinued across the entire region without delay.
- The post-screening treatments now given to diagnosed patients are less effective than the treatments used before.
- No screening program for any kind of cancer is ever capable of reducing the number of annual deaths from that cancer.
- Residents of the region who undergo the cancer screening live longer, on average, than the residents who go unscreened do.
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