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 the statements above?
- The five-year survival figure rose at least partly because screening added cases that were never destined to be fatal.
- Screening for this cancer should be discontinued throughout the region.
- The treatments given after screening are less effective than those given before screening began.
- No screening program for any cancer can reduce the death rate from that cancer.
- Residents who are screened live longer on average than residents who are not screened.
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