How did businesses try to increase demand during the 1920s

Hello. This question is incomplete. The full question is:

"How did businesses try to increase demand during the 1920s?

by inventing coupons . by waiving taxes . by producing more goods . by using advertising"

by using advertising

Explanation:

In 1920, companies invested in the sales of their products through large advertising campaigns, which stimulated and invited many people, at once, to try and buy their products. Advertising proved to be a very effective strategy to boost sales by allowing advertising campaigns to become more and more popular and to become the great asset of entrepreneurs.

These campaigns were carried out through radio broadcasting, or through advertisements spread throughout the city.

racism and segregation.

c. the dred scott v. sandford case,