Which of the following was not a plank of the populist platform?
a. government regulations of railroads
b. one term for all presidents
c. using only gold for currency
d. shorter workdays for all workers

C. using only gold for currency  was not a plank of the populist platform

Explanation:

The major role of the party was to develop a platform for free coinage and abolish the banks and other schemes that were connected with income tax. Therefore plenty of government activities were to be directed to people to decide the leaders. Foreigners were also not required to own any land, the working hours were changes and there was revision of the contracts of law for immigration reforms.

Therefore the goal of the populist was to abolish the democrats which were the second party nationally.

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )