Answer:
C. The local community center starts a free fitness program for all county residents.
Step-by-step explanation:
"Public health promotion" is meant to motivate people in the community to follow a healthy lifestyle. It provides awareness to people that having a healthy life is the way to be.
Among the choices above, it is only choice C that shows the best example of public health promotion. Having a free fitness program for all people will allow the residents to lead a healthy life by being active without any worry about the cost (since it is free). With this, they'll soon realize how important, fun and healthy it feels when working out that even without the free fitness programs, they'd continue exercising.