Which sentence in the selection could be considered the author’s claim of the selection “Bike Sharing”?

Which sentence in the selection could be considered the author’s claim of the selection “Bike Sharing”?

There are just so many cars that can use the same road at the same time.

To address this problem, some cities have begun to install bike lanes.

Many of the major American cities now have bike-sharing programs.

While bike sharing is not a perfect solution, the more people who use such programs, the fewer cars will be on the roads causing traffic jams and polluting the air.

While bike sharing is not a perfect solution, the more people who use such programs, the fewer cars will be on the roads causing traffic jams and polluting the air.