During the wartime, airplanes industries managed to develop the technology that allow the planes to move at higher elevation and speed, which would give a competitive advantage during the war.
The development in farming revolve around their preservation technique, which made is easier for the government to prepare the meal supply for their soldiers.
In addition to weaponry, communication, and medicine, the war time industries that had significant technological breakthroughs were "<span>c. airplanes, farming" since both of these were crucial to the war effort. </span>
