The Progressive Era was PRIMARILY concerned with making government responsible for the needs of the people. The correct option among all the options given in the question is option "a". This was the era when people with their movements were able to remove several corrupt government officials from their office and improve their lives.
Monoexportador porque solo tiene 2-3 bienes en su mercado de exportación y monoproductor porque basan su economía en un renglon fundamental