Not exactly. There are people who refine raw foods, treat them, or transport them. For example, some people transport the foods that farmers themselves produce. Others bake or cook said products. Learning how to properly refine harvested crops is incredibly important in baking, cooking, or processing. Basic culinary training is a must. Typically all three of these classes would either work in shops/small businesses, factories, or commercial/industrial kitchens.
NOW don't get me wrong I'm not copying the answer. You may feel that he or she has only helped 5 people so you don't trust the answer but I've actually helped a lot over my past couple of months.
Your Answer is C. The Islamic Sultanates directly controlled their territory, while the Church and the Pope relied on their influences with European rulers for its power.