Final answer:
The prohibition of hybridized crops is not a factor that has contributed to agricultural success in the US.
Step-by-step explanation:
The correct answer is D. The prohibition of hybridized crops is not a factor that has contributed to agricultural success in the US. Hybridized crops, which are developed through controlled breeding techniques, have been widely adopted in modern agriculture due to their increased productivity, disease resistance, and tolerance to environmental conditions. On the other hand, expansive infrastructure and mechanized equipment have greatly enhanced the efficiency and productivity of the agricultural sector in the US. Access to chemical fertilizers and pesticides has also helped increase crop yields by controlling pests and providing essential nutrients to the soil. Additionally, controlled population growth can result in a stable labor force and demand for agricultural products, supporting the success of the industry.