How did john d. rockefeller gain control of the oil industry

by the early 1880s controlled some 90 percent of U.S. refineries and pipelines. Critics accused Rockefeller of engaging in unethical practices, such as predatory pricing and colluding with railroads to eliminate his competitors, in order to gain a monopoly in the industry

Explanation:

wisdom

explanation:

the fact that that the teachings on the cosmic order comes from, or through, the heart center

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;