Final answer:
Dr. Charles W. Macune was a prominent farmer's advocate who led the Southern Alliance and helped to create a national coalition of farmers' organizations.
Step-by-step explanation:
Dr. Charles W. Macune was A) A prominent farmer's advocate. He was actively involved in the Farmers' Alliance, an organization that represented the interests of farmers in the United States. Dr. Macune led the Southern Alliance and was instrumental in urging the creation of a national alliance combining the Southern, Northwest, and Colored Alliances. This broad coalition aimed to address the difficulties faced by farmers and had a significant impact on their political representation. Despite racial tensions, these alliances came together to form a united front with a national agenda to advocate for the plight of farmers during a time when many felt the federal government was not adequately addressing their needs.