A public health nurse (PHN) collaborates with local community leaders to develop a local campaign educating about the importance of wearing a seat belt. Which of the following client systems of the integrative model does this describe?

A. Individual: This refers to direct one-on-one interventions, which is not the case in a public campaign. B. Community: The campaign is designed to affect the community as a whole, involving leaders and broad public outreach - this is characteristic of the community system. C. Family: Family-focused interventions target households or small family units, not entire communities. D. Aggregate: Aggregates refer to subpopulations with common traits (e.g., pregnant teens, smokers), not general community-wide efforts.