Answer:
A) Contacting the farming cooperative to negotiate the price of corn for your upcoming contract.
Step-by-step explanation:
You need to cut upstream costs, which means costs related to the supply of materials, parts and components, and the processing of the final goods.
Upstream costs include the price of raw materials and in this case, the raw materials are bought from a farming cooperative. By negotiating a lower price for corn with them, you can actually reduce your upstream costs.