I believe your answer is A <span />
<em>Consumers argued that monopolies gave big business an unfair advantage. Other people cited Social Darwinism to support big business, claiming that wealthy people were the most "fit". ... Interpret the effects of monopolies and cartels on the consumer.</em>
Since the Sherman Antitrust Act outlawed monopolies,John D Rockefeller would have been affected by it the most
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The Thirteenth Admendment abolished slavery
The Writings of Upton Sinclair showed the public the terrible conditions of the lower class and their food
The Supreme Court ruling of Gibbons v. Ogden encompassed the power to regulate navigation
Hoped this helped!
Medieval Western Europe had participated more in the political, religious, and intellectual trends of the post-classical world than other parts of Europe at the time. The reason for this was that in this part of Europe, the majority of all these trends were being developed at the time.