Question

John D. Rockefeller was MOST affected by which of these?

A) the Thirteenth Amendment
B) the Sherman Antitrust Act
C) the writings of Upton Sinclair
D) the Supreme Court ruling in Gibbons v. Ogden

Answer 1

Since the Sherman Antitrust Act outlawed monopolies,John D Rockefeller would have been affected by it the most
.
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!