During the Roaring Twenties, why did an increase in consumerism occur?

A. there were new technologies and new innovations to drive the sale of goods, since could afford them
B Machines and robots were used on assembly lines, making productions more efficient
C. Improvements in technology made life easier for all people
D. People were tried of the economy only producing necessary supplies

A. there were new technologies and new innovations to drive the sale of goods, since people could afford them.