Answer:
A secondary source summarizes large amounts of evidence.
Explanation:
Primary sources correspond to “primary literature” and are those that present themselves and are disseminated exactly as they are produced by their authors. Primary sources are original materials on which other research is based. This type of source presents the information in its original form, without interpretation, summarization or evaluation by other writers.
On the other hand, secondary sources are interpretations and evaluations of primary sources for this reason present a series of evidences that support their interpretations. In this sense, secondary sources may be more useful than a primary source.
The economy in the United States in the 1920's varied greatly from European countries. After WWl, Europe struggled to rebuild. Europe had taken the brunt of the attacks and went into a deep depression. The United States in contrast boomed. The economy was better than ever before. Since no attacks had happened on American soil, we were able to mass produce consumer goods, etc. People were buying on credit, investing in the stock market, and moving to the city. Life was good in America; not so good in Europe.