Answer: d. all of the above
Explanation:
The Forbes 400 is a an annual list published by Forbes magazine that shows the richest 400 people in the United States.
The Wealthy 100 is a book published in 1996 that showed the richest Americans of all time.
The Rich and the Super-Rich is a book by Ferdinand Lundberg that was published in 1968 and documented 500 wealthy American families who were said to run the economy.
All the above have therefore studied and documented the wealthy.
Answer: a Native American culture area
Explanation: The article talks about the existence of many native peoples in the American continent, before the arrival of the Europeans. The introduction of the article, gives a brief explanation of how these peoples arrived in America and spread across the continent. After the introduction, the article is divided into 10 sections that briefly describe the regions where these peoples have stabilized in North America, precisely in the USA. In summary, we can say that each section describes an area of Native American culture.
Michael or Dwight, Creed is also funny.