Which major accomplishment was achieved by darius i of persia?

the introduction of democracy in greece

the institution of a single language for government

the conquest of china

ending the practice of slavery throughout the empire

The right answer is "the institution of a single language for government ".

Darius organized the empire, dividing it into provinces (satrapias), and putting satraps to govern them. He organized a new unified monetary system, and made Aramaic the official language of the empire. He also instituted construction projects throughout the empire, especially in Susa, Pasargada, Persepolis, Babylon and Egypt - where he was also responsible for codifying the laws.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.

those who allied with france gained land and power.