If the school yard is kept tight for playing in public, the children of the community will have access to this place and will be able to carry out numerous activities safely in an environment aimed at children.
With these activities, children will be more active and less sedentary, not only because of games, but also through socializing with other children.
C is the most assertive refusal of all the examples, and it is also the safest. Bravo to Lindsay for not allowing people under the influence drive her around, it isn't a good idea to use subtances and operate machinery. Hope this helps!