Which of the following supports that persistence in engineering is a necessity?

After numerous rejections, Irving finally received donated aircraft to fulfill his ambition to become the youngest person to fly solo around the world.

By creating a hydraulic device that reduces waste by significant amounts, the world of fluid power was changed.

By designing a pneumatic power system with a force equal to that of a hydraulic system, construction vehicles were revolutionized.

After applying chemical engineering research to space applications, Aponte was able to study how the human body is affected during space travel.