President Roosevelt's call to action upon reading Upton Sinclair's The Jungle is best described as
O outrage toward the meat-packing industry, and imposing higher taxes on cattle farmers
O disgust and anger toward meat-packing industry workers known as muckrakers
O surprise at the public's demand for healthy livestock, and continued disbelief of Sinclair's claims
O movement to ensure sanitary conditions in meat-packing plants by signing new legislation