Final answer:
Option (c), Women played a particularly significant role during the Progressive Age, spearheading the women's suffrage movement, and alongside African American leaders, advancing democracy and social justice.
Step-by-step explanation:
During the Progressive Age, various groups played significant roles in enacting change; however, women were especially prominent in advancing the cause of social reforms. The women's suffrage movement, led by figures such as Elizabeth Cady Stanton, Susan B. Anthony, Carrie Chapman Catt, and Alice Paul, was a powerful force for progressivism. This movement, symbolized in part by the 'Silent Sentinels', was a clear demonstration of women's significant influence during the era.
Additionally, African Americans under the leadership of Booker T. Washington and W. E. B. Du Bois fought for civil rights and economic opportunities, although their strategies differed. Both these groups exemplified the Progressive commitment to promoting democracy and social justice.
Furthermore, it was not only women and African Americans who were involved in progressive reforms; Progressives as a whole encompassed a diverse assortment of middle-class, well-educated reformers. They sought government action to improve society by addressing issues like worker and consumer protections, advocating for environmental preservation, and supporting social justice movements.