1. I believe the answer is: B. JP Morgan
He was known as the most important person in banking industry, even until today. He involved in almost all consolidations of major companies at his time, and often hired by Congress in order to create economic policy that determine the nation's economy.
2. I believe the answer is: A. Andrew Carniege
He was born in a poor household, but manage to overcame the hardship and become the person who manage to monopolize the whole steel industries at the peak of his career. He was known to be one of the most largest contributors in charities, giving more than 9.5 billion dollar worth of charities until his death.
3. I believe the answer is: C. John D. rockefeller
Just like carniege, Rockefeller also managed to monopolize the oil industry at the peak of his career. Until now, he is regarded as the richest American, Currently, the richest person in the world is Jeff Bezos, with the net worth of around 160 Billion dollar. If convered to modern day's value, Rockefeller net worth could reach around 340 Billion dollar.