Answer:
The answer is b. Surpluses drive down prices
Step-by-step explanation:
If you have a large volume of crops, it would not drive up the price simply because there is not a lot of demand for the crop. In that sense, both c and d (even though d is relevant to the equipment) are incorrect. If there is a lot of surplus, farmers will have to lower their prices in order to sell it. They lose in profit which is why large crop surplus are a problem for farmers.