If one were to argue that World War II was the most prolific time for agricultural research and development, which of the following statements would best defend this assertion?

1. Private companies were heavily invested in the success of farms across the nations, so they funded agricultural research and development.
2. Government agencies were doling out funds to farms in need of financial assistance to keep the United States’ food supply full.
3. Citizens back home resorted to creating innovative ways of making food and crops last longer due to lack of manpower and funding.
4. Soldiers saw more efficient tools in Europe, so they sent home descriptions and drawings so their families would make and use the tools.

3. Citizens back home resorted to creating innovative ways of making food and crops last longer due to lack of manpower and funding.

Explanation:

During world war, the large portion of production in the country shifted to accommodate the needs of the military. For example, there were many  companies who operated in other industries shifted their production to weapons , airplanes or tanks.

Food was also one of the industries that was forced to adapt.

The situation create an overwhelming demand for foods that are easy to carry, and can last a really long period of time (since the soldiers have to carried it out on the battlefield) . This attract many companies to   conduct agricultural research and development in order to invent those type of products.