Answer :
assembly lines helped reduce the prices of higher-cost products, such as automobiles, for consumers in the 1920s
The option that best exemplifies what helped reduce the prices of higher-cost products, such as automobiles, for consumers in the 1920s is assembly lines. In the 1920s, manufacturers made products faster and more cheaply because they adopted Henry Ford's manufacturing techniques. Industrialization pioneer Henry Ford developed mass production techniques as the assembly line which reduced the production costs and made possible to manufacture hundreds of cars per day.