4. The national income tax, free and unlimited coinage of siver, and the direct
election of U. S. Senators were proposals included in the
O
Declaration of Sentiments
O
Federal Reserve System Act
O
O
Populist Party Platform
Sixteenth Amendment

The National Income tax, free and unlimited coinage of silver and the direct election of United States Senators were proposals included in the Populist Party Platform.

Explanation:

The Populist Party Platform existed in 1896, which was known as The Progressive Era, the platform called for a higher income tax, direct election of senators, restrictions on immigration and so on.

Question:

The national income tax, free and unlimited coinage of silver, and the direct election of senators were proposals that were included in the  

Populist Party Platform

Explanation:

The Populist Party of the late 19th century was a grassroots movement with farmers at its center. The movement was defeated. By the late 19th century, the US was no longer an agricultural nation, but an industrial one. Many of the Populist Party ideas were later incorporated into US government; for example, direct election of Senators and a graduated income tax.  

d: social contract theory

several states had passed similar laws, but they were limited to intrastate businesses. the sherman antitrust act was based on the constitutional power of congress to regulate interstate commerce.

you answered my friends question just to get the coins you didn't even give a valid response.