Which of the following is not evidence of the consumer culture of the 1920s?
a. a nationwide craze over sports and spectator games
b. an increased focus on leisure time
c. a decline in advertising
d. a growth in industry

The best option from the list would be that "a. a nationwide craze over sports and spectator games" is not evidence of the consumer culture of the 1920s, since this does not necessarily meant that people were buying tickets to the games. 

It can provide a social code to protect each citizen's future economical earnings. and then obviously defending the country from invading countries.