Answer:
The answer is: Advertisers reached more Americans than before, which led to the growth of consumer culture.
Step-by-step explanation:
The "radio" became very powerful in the 1920s. Every American home displayed the radio as a necessity for entertainment. It immediately became a means for many advertisers to reach out to their consumers.
This gave them a chance to reach a broader variety of people. Since this era was a prosperous time for people, the consumer goods increased. Many manufacturers used the radio as a means to advertise their goods and it was indeed an effective method.
Consumption culture grew, whereby people purchased goods by credit. For example, the radio would announce to people that if they cannot afford to purchase a specific good for its price, then they can do so by paying it in installment basis.