The correct answer is A) curbing monopolies on utilities.
Progressive reforms at the local level included curbing monopolies on utilities.
The Progressive Era was the period of many formations in the politics of the United States from 1890 to 1920. Journalists known as the muckrakers influence progressive reforms in that they investigation corruption acts in the government and this made people support reformations. One of the most important things was that the US government put an end to monopolies that had previously benefited so much to companies such as Standard Oil of John D. Rockefeller or the Steel Company of Andrew Carnegie.