What is attributed to boosting college enrollment numbers from 50,000 students in 1870 to over 600,000 students by 1920?.

Based on this poster, what conclusion can be made about the u.s. government during world war i? it wanted to boycott trade with enemy nations. it wanted to provide low-cost loans to its allies. it was not able to fully finance the war effort through taxes. it believed the majority of its citizens did not support the war.