As a result of long hours, unsafe working conditions, and other forms of exploitation, worker in the late 1800s?

The late 19th-century United States is probably best known for the vast ... had replaced highly skilled craftspeople in one industry after another. ... discipline, forcing workers to work set hours which were often very long. One result of mechanization and factory production was the growing attractiveness of labor organization.

Explanation:

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

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.