Who owned the company that controlled over 90% of the nation's oil refining industry?
Andrew Carnegie
Jay Gould
John D. Rockefeller
Alexander Graham Bell
http://www.google.com/#q=90%25+of+the+nation%27s+oil+refining+industry
John D. Rockfeller
John D. Rockefeller owned the company that controlled over 90% of the nation's oil refining industry. To find the answer to this question, you can use various methods, such as researching historical figures and their business interests during the relevant time period.
One way to find this information is by using a search engine like Google. You can search for terms like "owner of major oil refining company" or "dominant figure in the oil industry." This will likely lead you to sources that mention John D. Rockefeller and his ownership of the company.
Another approach would be to look up prominent figures from the late 19th and early 20th centuries who were involved in the oil industry. By researching these individuals, you will come across John D. Rockefeller and his company, Standard Oil, which controlled a vast majority of the oil refining industry at the time.
Furthermore, consulting historical books or articles about the oil industry can provide detailed information about the key players during that period. These sources often mention John D. Rockefeller's name in connection to the dominance of the oil refining industry.
In summary, to determine that John D. Rockefeller owned the company that controlled over 90% of the nation's oil refining industry, you can use search engines, research historical figures, and consult books or articles about the oil industry during that time.