How did the Progressive reformers of the late 19th-early 20th century respond to the abuses and extravagances of the so-called Gilded Age?

Progressive
reformers used writing and photography to expose the abuses and excesses of the Gilded Age. For
example, journalist Ida Tarbell wrote a book called The History of the Standard Oil
Company. This book led to laws that broke up monopolies, including Standard Oil
Company's monopoly.

Likewise, photographer Jacob Riis was able to use
advances in technology in photography to take pictures inside dark tenement
dwellings,...