The 16th ammendment (graduated income tax) and 17th ammendment (direct election of senators) were originally ideas of what 1890s successful 3rd party who never won a presidential election

Populist party

Explanation:

The 16th amendment (graduated income tax) and 17th amendment (direct election of senators) were originally ideas of POPULIST PARTY (an 1890s successful 3rd party who never won a presidential election)

This is evident in the fact that though the Populist Party never won a Presidential election, they were more successful in influencing the political landscape of the United States during their existence.

Some other legacies of the Populist Party are:

1. expansion of currency and credit structure

2. Railroad legislation

3. Postal saving banks

4. Subtreasury plan.

the correct answer would in fact be b. (:

b.) deny other rights to the people