How did rockefeller and the standard oil company get around laws that forbade companies in one state from underselling or doing business in other states? they bribed congressmen to change the laws. they ignored the laws since they were not enforceable. they developed the idea of creating trusts. they decided to monopolize the oil business.

They developed the idea of creating trusts.

Explanation:

The Standard Oil Company was at its time the largest oil refinery and it was a monopoly created by Rockefeller and his associates, trusts were basically an agreement between several smaller corporations to cooperate between them to generate revenue and profit for all of them, it was basically an agroupation among several companies that had a common goal, it was labeled as a monopoly after several legal battles and had to be dissolved.

i believe the correct answer is b.