Answer:
The answer is: A) Farmers will substitute the production of other agricultural goods? (like soybeans) with corn.
Explanation:
When the price of a certain product increases so steeply, new suppliers will enter the market to offer their products.
Since farmers can only produce one crop at the time in a certain lot, they will always tend to produce the crop that gives them the highest profit. In this case if corn becomes very expensive, it is reasonable to assume that more farmers will produce corn by substituting others crops (like soybean or wheat).