Get expert advice and insights on any topic with IDNLearn.com. Discover the information you need quickly and easily with our reliable and thorough Q&A platform.

What was the single biggest economic factor that ignited the spirit of progressives?

a. The creation of a national bank
b. Republican tariff policies in the 1880s and 1890s
c. the economic depression of the 1890s
d. the failure of the populists’ quest for silver coinage