D. All of the above.
Farmers in More Developed Countries (MDCs) grow crops and raise animals for a variety of purposes. They may sell their products directly to consumers, such as at a farmers' market or through a Community Supported Agriculture (CSA) program. They may also sell their products to food-processing companies, which turn the raw materials into packaged and processed foods. Additionally, they may sell their products to markets, such as wholesale markets or supermarkets, which then sell the products to consumers. So, farmers in MDCs can sell their products to consumers, food-processing companies, and markets.