A. Millions of Troops Needing Jobs
The 1920s industry that had the greatest effect on the economy of the 1920s was the A. automobile industry.
Cars were very important at the time, and remain important even today.
The key characteristic that marked American mainstream society during this time was "stability". America had just emerged from World War II with a great deal of economic prosperity which allowed many people to buy houses and live peacefully in suburbs.
