Which statement describes an example of problem$-$oriented policing?

a$.$ After identifying gun crime hot spots, the Carrollwood PD increases patrol in those areas including street searches of suspicious individuals.

b$.$ Officers from the Vienna PD use tactical gear and weapons when dealing with protestors in their town.

c$.$ The Townville PD uses technology to make predictions about crime trends.

d$.$ In response to strained community police relations, officers conduct monthly meetings with community members and increase foot patrols throughout their neighborhoods.