The social change in the late nineteenth century that MOST contributed to the ability of women to lead and participate in social reform movements is:
C. The increase in women’s education gave women the knowledge and skills needed to more effectively organize and participate in political campaigns.
This increase in education was pivotal in empowering women, providing them with the tools to advocate for various reforms, including women's suffrage, labor rights, and temperance. Educated women were better equipped to articulate their views and mobilize support, thereby playing a crucial role in social reform movements.