In 1892, the populist party fought for the regulation of
a.
railroad rates and an income tax
c.
an eight-hour workday
b.
immigration limits
d.
all of the above

a. railroad rates and an income tax

Explanation:

The first Populist National Convention was held July 2-5 in Omaha. There were 1300 delegates present. The Populist Party was formed in 1892 to advance the interests of agriculture against the growing power of the railways. The party argued that rail tariff regulation and a fixed income tax should be established.