Final answer:
Reformers in Oklahoma sought to include progressive reforms such as women's suffrage in the state constitution. Their influence was part of the broader Progressive Movement aimed at making government more accountable and democratic.
Step-by-step explanation:
The role that reformers played in Oklahoma statehood chiefly revolved around progressive reforms to be included in the state constitution. These reformers were interested in incorporating ideas of the growing Progressive movement into state governance. This included demands for such reforms as women’s suffrage, labor rights, educational advances, and other democratic principles that aimed at making state government more accountable and responsive to its citizens. This is exemplified by the support for women's suffrage seen in the Western states, where women were also participating actively in elections and even holding political office. Consequently, the correct answer to the role played by reformers in Oklahoma statehood is: C. They pushed for progressive reforms to be included in the constitution.