One of the Most Important Economic Transformations in the Years

One of the most important economic transformations in the years after World War I was

A) the shift from industry's reliance on railroads to reliance on the automobile.
B) the shift in production from heavy industry to consumer goods and services.
C) the move from the Northeast and Midwest to the West Coast as the country's industrial heartland.
D) a change from a more cooperative to a more adversarial relationship between government and business.