How did john D. Rockefeller make his money?

Difference between unfair trade practice and restrictive trade practice? How much money is made yearly in British Columbia from their forestry industry? Is bronze more valuable than silver? What industrial by-product has become a valuable commodity? Why do we need responsibility? How much in English pounds is 9.99 dollars? What is the definition of a normal good and how does it impact consumer behavior? How to calculate short run profit output rate? How can unfair trade affect people? What happens when demand rises by more than supply falls? Definition of prudential regulation? What is it called when a country will not trade certain goods with another country? Is division of labor a system of manufacturing and of granting economic rights and privileges to a given geographic area? What does the term Fourth Estate refer to? Which agreement brought caricom into the exitance? What helped the economy grow in the 1950s? Under which tax system do poor people pay a larger proportion of income than wealthier people? Why is there such a wide variety of goods and services in a market system? What part of the economy are thriving now and which are suffering? If a house owned by a son but with a life estate maintained by his mother should burn down who would get the proceeds from the insurance?