What did the supreme court rule in the munn v. illinois case?
states can regulate railroads that operate interstate.
states can regulate grain storage fees in their states.
states cannot regulate large businesses at all.
states cannot regulate railroads that operate interstate.

The correct option is B.
During the time of depression in 1870s, the Illinois legislature made a law which regulates the amount of money that storage facility operators can charge their customers. There is a particular storage company, that did not want to go by this law and the issue was taken to court. Eventually, the supreme court ruled that the state has the legitimate right to impose price regulations on private companies. This case involved the right of the state to regulate prices by private companies for the storage of grain but later it also directly affect the constitutionality of state railroad regulation.