Without seeing the specific poster you are referring to, I can provide some context regarding the themes prevalent in American propaganda from 1917, particularly related to World War I.
If the poster is suggesting that the United States should take military action against Germany, it would likely align with option A, which mentions fighting Germany to protect U.S. borders. This aligns with the sentiment of the time, as many posters sought to mobilize American support for entering the war.
If the poster conveys a message of detachment or non-intervention in European affairs, then option B or C could be applicable.
Option D seems less likely to be the primary message of a World War I propaganda poster, as it appears quite exaggerated and not thematic to the era’s typical messaging.
If you can provide a description or detail of the imagery or text from the poster, I could offer a more precise analysis. Based on common themes from the time, I would lean towards option A as the most likely suggestion made by a pro-war propaganda poster from that period.