easy · GRE Verbal
Last year, the town of Alder Creek installed automated speed cameras along Main Street. In the twelve months that followed, the number of traffic accidents on Main Street fell by 30 percent. The town council concludes that the speed cameras caused the decline in accidents.
Which of the following, if true, most seriously weakens the council's conclusion?
- The speed cameras issued more tickets in their first month of operation than in any later month.
- Several drivers have complained that the cameras occasionally record inaccurate vehicle speeds.
- During the same year, the town repaved Main Street and installed brighter streetlights along it.
- Accident totals on Main Street had risen steadily in each of the five years before the cameras arrived.
- Towns across the region spend more each year on traffic enforcement than on road maintenance.
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