What made john d. rockefeller such a successful businessman

The correct answer to this open question is the following.

What made John D. Rockefeller such a successful businessman was its tenacity, unwilling commitment to work, and his visionary mind.

John D. Rockefeller (1839-1937) started to work hard since age 14, in small tasks in Cleveland, Ohio. He worked really hard and seized some opportunities that by 1860, made him enter the oil business. He opened his first refinery in 1863, and by 1870, his Oil Standard  Company started to grow. Things did well and he started to acquire all his competitors until the Standard Oil Company became a monopoly.

it is the dominance of   the spanish language and roman catholic region in mexico, french being the official language of several african countries, and the existence of a western-style government in south asian countries

the pogroms became known as kristallnacht, the "night of shattered glass," for the shattered glass from the store windows that littered the streets. the morning after the pogroms 30,000 german jewish men were arrested for the "crime" of being jewish and sent to concentration camps, where hundreds of them perished.