Wearing seat belts is required in many communities. Children of a certain age must be restrained in a car seat or seat belt when riding in a car. Which of the following best describes what has happened in this community?

A. Media interest in protecting the public: Media may play a role in promoting awareness, but laws and requirements come from policy decisions. B. Healthy public policy: This is a classic example of a public safety law developed to reduce injury and mortality - a core element of healthy public policy. C. Unilateral action: Implies action taken by one individual or body without collaboration, which is not the case in public law development. D. Participation in health: Refers more to community engagement or individual involvement in their own care - not legislation.