Even though the food code is not a federal law, the federal government writes it. which agency is in charge of maintaining the food code?

The Agency that oversees maintaining the food code is the United States Food and Drug Administration or FDA. They are the one publishing the code of the food. A model assisting the control of food’s jurisdiction at all levels of government by giving them with a method of scientific sound or technical and legal basis for managing the retail and food service division of the industry either grocery stores or restaurants. 

Ithink it would be choice b (county). hope this you!