One way the u.s. government responded to the problems caused by the conditions in this list was by

The correct answer is by passing the Interstate Commerce Act.
The causes responsible for economic problems during the Gilded Age included a rather fast growth of monopolies and trusts, very strict business tactics, along with unfair practices and rates. The US government tried to fix such problems with the Interstate Commerce Act, passed in 1887, whose aim was to deal with such irregularities within the railroad industry and monopolies. 

ththis should be under spanish