One of the beliefs of the populist party was
a. few government regulations of businesses.
b. the aggressive expansion of american territory.
c. the need for coinage of silver money.
d. the need for higher tariffs to protect american industries.

The correct answer is letter D.

The populist party's motive was to protect American industries by implementing higher tariffs. It was organized in 1892 in St. Louis, where common folks, especially farmers represented its platform against the interests of bigger companies to their limited industries. James K. Weaver was the president of the Populist Party.