Upton sinclair's book the jungle exposed the unsanitary conditions in the chicago slaughterhouses of the early 1900s. the public outrage caused by this sort of investigative reporting led directly to the
a. passage of the meat inspection act and strict regulations for the meatpacking industry.
b. creation of the square deal and the establishment of new areas of national parkland.
c. election of theodore roosevelt and the end of u. s. involvement in the philippines.
d. founding of the progressive party and universal suffrage for women.