Plz help! Choose one individual who actively tried to make change occur during the Progressive Era and explain what changes they tried to make. Be sure to include specific detail.

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.