Select four third-parties from the list below:
a. prohibition
b. new party
c. greenback
d. democrat
e. republican
f. united we stand

A,B,C and F are the correct answers.

Explanation:

Most of the US presidents since the mid-1800s had come from either the Democrats and the Republicans. Democrats and Republicans dominate politics in the USA. There are 52 other political parties. The term third parties are used for political parties apart from the Republicans and Democrats. The other parties who have fielded their presidential candidates are  Green party, Natural Party and the Libertarians.

this isn't a question and if you're going to list things be kind and use commas.