What were the "Four Minute Men" known for during World War I?

The "Four Minute Men" were primarily known for speaking at social events during World War I. This initiative was established by the Committee on Public Information (CPI) to promote the war effort and boost public morale. Volunteers known as Four Minute Men were trained to deliver brief speeches—typically around four minutes long—at various gatherings, such as community events, theaters, and social functions. Their goal was to inform and persuade the public about the importance of the war, encourage enlistment, promote war bonds, and foster support for government policies related to the war.

This approach was effective in reaching diverse audiences and creating a grassroots movement of support for the war, making them an essential part of the government's public relations strategy during this period. While the other choices mention important activities related to public support and communication, they do not capture the specific role and function of the Four Minute Men as effectively as their speaking engagements at social events.