Which titan is correctly matched with his industry?

John D Rockefeller: He was an American industrialist and philanthropist .He revolutionized petroleum industry and defined the structure of modern philanthropy. He was the head of the Standard Oil Company and one of the world's richest men. He used his fortune to fund ongoing philanthropic causes.He was a  careful and studious businessman who refrained from taking unnecessary risks, Rockefeller sensed an opportunity in the oil business in the early 1860s. With oil production ramping up in western Pennsylvania, Rockefeller decided that establishing an oil refinery near Cleveland, a short distance from Pittsburgh, would be a good business move. In 1863, he opened his first refinery, and within two years it was the largest in the area.

experiments.

surveys.

questionnaires.

interviews.

case studies.

participant and non-participant observation.

observational trials.

studies using the delphi method.