How was rockefeller able to become so successful in the oil business? he set about forcing competitors to sell out to him. he was the only one to use railroads for shipping his oil. he knew where all the best oil fields could be found. since he had so much money, he would underbid other companies.

The first ten amendments, known as the bill of rights, protect individual freedoms and limit the power of the federal government. what amendment limits the powers of the state government and extends bill of rights' protections to citizens of a state? a) 12th amendment b) 14th amendment c) 15th amendment d) 17th amendment