Which of the following was NOT an example of a muckraker in the Progressive Era?
A)Upton Sinclair wrote The Jungle, a book that exposed the disgusting conditions in the meatpacking industry.
B)Jacob Riis published moving photographs depicting the difficulties faced by the urban poor.
C)Ida Tarbell wrote a book that alerted people to the problems of monopolies like Standard Oil
D)F. Scott Fitzgerald wrote The Great Gatsby, a novel about life in the roaring 20's.