What was the significance of the year 1920 in the context of the Progressive Era?

The significance of the year 1920 in the context of the Progressive Era primarily revolves around the introduction of women’s suffrage in the United States. This was the year the 19th Amendment was ratified, granting women the right to vote. This milestone marks a crucial achievement of the Progressive Era, which was characterized by reforms aimed at expanding democratic participation and addressing social issues. The women’s suffrage movement was one of the pivotal reforms during this period, showcasing the efforts toward achieving equality and expanding civil rights.

While the other options may pertain to important historical events, they do not define the central aspect of 1920 in terms of the Progressive Era's impact on American society. The end of the Great Depression, for instance, occurred later with the economic policies of the New Deal in the 1930s, and Prohibition laws, established by the 18th Amendment, took effect in 1920 but are not as closely tied to the reforms associated directly with the Progressive Era as women's suffrage. The option suggesting that 1920 marked the final year of Progressive Era reforms overlooks the ongoing influence and repercussions of these reforms that continued to evolve in subsequent decades.