Final answer:
Brian characterized supporters of free silver as advocates for an economic policy that would alleviate the struggles of workers and farmers, and increase overall investment opportunities by expanding the money supply through bi-metallic currency backed by both gold and silver.
Step-by-step explanation:
Brian described those who were in favor of free silver as proponents who believed that introducing a bi-metallic standard, including unlimited coinage of silver, would benefit various economic groups, particularly working-class Americans and indebted farmers. He viewed them as supporters of a cause that would stimulate investment, raise the fortunes of those in debt, and offer broad economic benefits, although specific advantages to businesses were not clearly outlined.