Final answer:
With the adoption of new technology to fatten chickens, the farm's production possibilities frontier (PPF) shifts, showing increased efficiency. The opportunity cost of producing a bushel of soybean decreases because fewer chickens must be forgone, indicating a shift in resource allocation towards more efficient chicken production.
Step-by-step explanation:
The opportunity cost of producing a product increases as more of it is produced. When the farm adopts a new technology to fatten chickens using fewer resources, the production possibilities frontier (PPF) will shift. We label the initial PPF as PPF0. After the technology adoption, we show the impact of the new technology with a new PPF, labeled PPF1, which would be higher for chicken production. This reflects a more efficient use of resources in chicken production.
With respect to soybean production, with the new technology, the opportunity cost of producing a bushel of soybean decreases; fewer chickens must be forgone to produce a bushel of soybeans. Therefore, the correct answer is C. decreases; fewer chickens.