Final answer:
Youth joined the army during World War I due to the romanticized image of wartime heroism, the influence of war stories, and the longing for a cathartic release and adventure that was seen as a moral crusade and a test of manhood. The correct option is A.
Step-by-step explanation:
There are various reasons why youth joined the army, particularly during the era of World War I. The romanticized view of wartime heroism and the desire to partake in what was seen as a moral crusade significantly influenced the decision of many young men.
Additionally, the influence of war stories that portrayed battle as a right of passage to manhood, tales of the past military glories, and the cathartic release that some believed war would bring, combined to make the idea of joining the army a compelling choice for the youth seeking excitement, purpose, or identity. The correct option is A.