Which political party of the late 1800s proposed a graduated income tax and direct election of u. s. senators?

a. socialists
b. prohibitionists
c. nativists
d. populists

What is the columbian exchange? o a. the changes that resulted from europeans settling in the new world b. the relationships that columbus and his men had with the natives they met o c. the ships that columbus bought with money from the king and queen of spain o d. the increase in the number of native american towns in the new world