8. what was the significance of the interstate commerce act (1887) and the sherman antitrust act (1890)?
a. they prevented shoddy goods from being sold across state lines.
b. they raised tariffs to encourage the further growth of big business.
c. they were used to break up labor unions for interfering with free enterprise.
d. they established the principle that congress could regulate some business practices.

The significance of both Interstate Commerce and Sherman Antitrust Act was they established the principle that Congress could regulate some business practices.

Option D

Explanation:

The interstate commerce act passed in the year 1887 and the Sherman antitrust act which was passed in the year 1890 were both formed so that trade and business could be regulated and improved and they tried to remove the hurdles, obstacles of the trade and the business and to remove monopoly from the market of any good which was present in the market.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain

it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!