Which of the following situations most strongly represents an example of citizens demonstrating collective responsibility?

A gathering of citizens at a city hall meeting becomes unruly when groups on opposing sides of an issue begin shouting down each other's speakers.

During a severe snowstorm in an isolated community, several local merchants agree to double the price for snow shovels and other snow$-$removal hardware.

Citizens in a community set up a neighbourhood patrol to watch for and report any suspicious or criminal activity to authorities.

In a small city, garbage collection is turned over from city$-$operated trucks with city employees to a large corporation that promises to reduce collection costs.