It is not a or b, because it helps kids of all skill levels. Because of this, your answer should be C, because Piaget believed that teaching should be done through actually teaching students different concepts, instead of making them just know the answers. That is what cooperative learning helps do.
D. provision of emergency services to injured victims at the accident scene.
I say it is a because it is important to maintain a healthy weight plan
D) there are no processed foods in African cultures.