Invention of Cars the Reason for the Boom?

I disagree because there were a lot of other inventions and discoveries. Maybe without the invention of cars the glass, leather, steel, & rubber industries wouldn't have done as well, but that doesn't mean that cars were the source of the boom. The Natural Resources map showed us how America started using more natural resources for their everyday life. There were pictures of men building new skyscrapers and buildings, and electricity was invented and used frequently. Other companies boomed as well like the airplanes, radios, fridges, and clothing.