Answer:
4) The Interstate Commerce Act established regulations for the railroad industry.
Step-by-step explanation:
The Golden Age is an era in the history of the United States between 1870 and 1900. This period was well known for its political scandals and lavish displays of riches. In the same period, this was an age of big advances in business and the economy that dramatically changed the lives of American people.
Interstate Commerce Act was intended to tackle the concerns of rail abuse and discrimination ensuring a reasonable rate of shipping; secret rebates were prohibited, tariffs had to be published, price discrimination against small markets had been made illegal.