medium · Gre Verbal

A city introduced a bike-share program and, one year later, reported that bike-share members are 40% less likely to be overweight than the average city resident. The transportation commissioner cited this figure as evidence that the bike-share program is improving residents' health. Which of the following, if true, most seriously WEAKENS the commissioner's reasoning? A) The bike-share program has more members in its second year than in its first. B) People who choose to join a bike-share program are disproportionately those who were already physically fit and health-conscious before joining. C) A minority of bike-share members report that they use the bikes only occasionally. D) The city's public transit ridership declined slightly after the bike-share program launched. E) Some overweight residents say they find the bike-share stations inconveniently located.

1. The bike-share program has signed up considerably more paying members in its second year of operation than it did in its first.
2. People who choose to join a bike-share program are disproportionately those who were already physically fit and health-conscious before joining.
3. A sizable minority of the bike-share members surveyed report that they actually use the shared bikes only rarely or occasionally.
4. The city's own public bus and rail transit ridership figures declined slightly in the several months right after the new bike-share program was first launched.
5. Some overweight city residents say that they find the current bike-share docking stations to be inconveniently located for them.

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