Which of the following events likely influenced the rise of social reform movements in the 1920s?

The rise of social reform movements in the 1920s can be significantly attributed to the women's suffrage movement. The ratification of the 19th Amendment in 1920 granted women the right to vote, which marked a pivotal moment in American history. This achievement not only empowered women politically but also led to an increase in their visibility and participation in social issues beyond suffrage, including education, labor rights, and health care.

As women began to exercise their new political power, they became more actively involved in advocating for various reforms, including the temperance movement and issues surrounding family welfare. The momentum created by the suffrage movement galvanized other social reform movements, creating a network of activists who sought to address a wide range of societal issues. Thus, the suffrage victory was a catalyst for broader social change in the 1920s, as new proponents of reform emerged, driven by the desire to improve society in various dimensions.