Free public schools just free public schools
People gather during sports fest or any activities that relate to sports. These are the opportunities that different people from different places are able to showcase their physical abilities and strengths. How this effectively build the nation and promote diversity is that, it encourages unity. Unity in a way any people in different places come together to witness such event. This is a great chance for promotions and awareness events.
The third answer/C seems to be the most accurate, as a good economy would ideally have a balance between needs and ideals.
