4. Which technological innovation had the greatest impact on the growth of the US into an industrialized society? Explain. · Steel (Bessemer Process)

· Oil

5. Who was the most influential businessman of the late 20th century? Explain.

· John D. Rockefeller

· Andrew Carnegie

· J. P. Morgan

· Cornelius Vanderbilt

6. Which labor union had the greatest impact on the lives of workers? Explain.

· American Federation of Labor

· Knights of Labor

· International Workers of the World

Steel,  J.P. Morgan, Knights of Labor

Explanation:

roosevelt essentially took the opposite approach as hoover in taking on the great depression. herbert hoover thought that america and its economy could naturally recover from the depression in due course, so he adamantly restrained the federal government from intervening on behalf of the people affected. on the other hand, roosevelt dramatically increased employment by expanding the federal government and establishing agencies that would aid in relieving some of the country's worst problems.