According to the "Ford's Portable Plane Car" by Jackson Smith, what caused Henry Ford to give up on light airplane manufacturing?(1 point)
He thought affordable "flying cars" were unrealistic and predicted they would never come to be.
He disliked the idea of "flying cars" and compared the idea to bees swarming.
His model Flying Fivver crashed on its test flight, killing his friend.
The building materials became too costly.