I believe it's persuade. You want to persuade schools to offer better food. B is wrong because you are not entertaining anyone. Inform is wrong because you would just be stating facts. A is wrong because you are not telling someone to do something. Hope this helps! ;)
Brainstorming. Researching. Many different techniques :)
D: the children giggled at the elephants spouting plumes of water through their trunks.
