Final answer:
Based on historical context, Americans in the post-war period and during the 1920s sought prosperity and favored less business regulation, but were not particularly eager to return to progressivism or become more engaged in social issues.
Step-by-step explanation:
The question seeks to understand the attitudes of Americans, particularly during periods of rapid social change and defining moments such as the end of World War I and the Progressive Era. To answer which statements describe American attitudes, we can use the provided historical context.
First, Americans were eager to return to progressivism seems incorrect because the provided texts suggest that after World War I and during the 1920 election, Americans were largely looking for a return to 'normalcy' and not the progressive reform that had characterized the early 20th century.
Second, it is accurate to say that Americans hoped to enter a time of prosperity given the focus on economic prosperity and stability post-war.
Third, the statement that many Americans supported less regulation in business corresponds with the attitudes of the era, as in the wake of the war, there was significant support for limited government intervention in the economy.
Lastly, the claim that Americans became more interested in social issues might be partially true in the context of the Progressive Movement, but in the broader scope of the post-war period, there was a retreat from the pursuit of social reform.