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

One of the beliefs of the Populist party was D. THE NEED FOR COINAGE OF SILVER MONEY.

Populist Party were formed by farmers who were greatly affected by the introduction of the Industrial Revolution.

Farmers sold their crops to middlemen at a price which they believe are not sufficient to augment their daily expenses.

Populist Party wanted the some of following government actions:
1) free coinage of silver
2) graduated income taxes
3) abolition of national banks
4) non-ownership of lands by foreigners
5) plenty of paper money and many more.

The answer to the question is a.