Answer:
Sherman antitrust act
Step-by-step explanation:
The Sherman Antitrust Act was a law passed in the United States that made trusts illegal, this meant that this little associations by different companies that united formed a gigantic corporation and that bascially created a monopoly in the oil industry had to sell their partitions and with that increase the competitiveness. This was a direct attack on Standar Oil and the American Tobbacco company.