Which event triggered the start of World War I? Austria-Hungary declared war on Serbia. Archduke Francis Ferdinand was assassinated. The Triple Alliance was formed. The Triple Entente was formed.

the answer. is b

hope this : d

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.