Answer:
Upton Sinclair
Explanation:
He wrote a novel called The Jungle which was about the horrors of meat packing facilities.
Although the United States was actively involved in World War I for only nineteen months, from April 1917 to November 1918, the mobilization of the economy was extraordinary. ... Over four millionAmericans served in the armed forces, and the U.S. economyturned out a vast supply of raw materials and munitions.
Prevent the incalculable loss of life it would take to invade mainland japan.
