Which of the following describes a passage with ideas and events organized by problem and solution?
1. In April, the city started ticketing owners for dogs that were off-leash. In May, the city asked that owners not walk dogs on sidewalks.
2. After several delivery people complained of encounters with unleashed dogs, the city council passed a new ordinance. As a result, many citizens were unhappy.
3. The city is concerned about dogs being walked on the sidewalk. Perhaps the park district could build a dog run.
4. A total ban on dogs in public spaces would protect delivery persons, but restrict the rights of dog owners. However, a designated dog park would allow dogs to play safely but in a safe place.