Memory Game MuckrakersOnline version Memory Game by Jefferson County ESC Upton Sinclair she exposed the business practices of the head of industrial mogul John D. Rockefeller he published his most well-known work “The Jungle,” Ida Tarbell Term used to describe the investigative journalists of the early 1900s who exposed many problems and issues in urban America. first to write about the conditions of the urban poor, and eventually photographing them Muckrakers Jacob Riis