3. Explain how Rockefeller’s company, Standard Oil, used monopolies practices to gain control of most of the entire oil industry in the U. S.?

He bought out all other producers in the US cornering the market. This means that he was the only producer in this area of sales allowing him to have NO COMPETITION.

Explanation:

your answer is 1930's

explanation

this is just around the time the great depression was starting and putting the us ecnomy into ecnomic failure causing the goverment to take a much larger rule to try and pieace it back together