Oin 21. One example of a historic 3rd Party is? C Democrat Republican Populist Federalist Dixiecrat

## Step 1<br />The question is asking for an example of a third party in U.S. history. A third party, in the context of U.S. politics, is a political party that is not one of the two major parties, which are the Democratic Party and the Republican Party.<br />## Step 2<br />The options provided are the Democratic Party, the Republican Party, the Populist Party, the Federalist Party, and the Dixiecrat Party. The Democratic Party and the Republican Party are the two major parties in the U.S., so they cannot be considered third parties.<br />## Step 3<br />The Populist Party, the Federalist Party, and the Dixiecrat Party are all examples of third parties in U.S. history. The Populist Party was a significant third party in the late 19th century, the Federalist Party was one of the first political parties in the U.S. in the early 18th century, and the Dixiecrat Party was a segregationist party that splintered off from the Democratic Party in the mid-20th century.<br />## Step 4<br />Among these options, the Populist Party is the most prominent and well-known third party in U.S. history.