Refers to the time period after world war i when america saw a boom in its economy, especially in the early 1920s.

The Roaring 20s

Explanation:

The The Roaring 20s corresponds to the period of economic prosperity that the United States had from 1920 to 1929, as part of the expansive period of an economic cycle. This prosperity benefited the whole society and caused the economy to continue growing at a rate that had not been registered before, generating a speculative bubble. But this prosperity would last a short period that would end on October 24, 1929, known as the Black Thursday, and with the arrival of the Crac of 29 that would finally culminate with the coming of the Great Depression because of this.

what are the choices?

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.