Marx and engels thought that all history was the history of class struggles. they believed that a. the bourgeoisie would revolt b. gradual reforms would improve society c. the proletariat would overthrow the bourgeoisie d. the bourgeoisie would eventually control the proletariat

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.

the communist manifesto is an 1848 political pamphlet by the german near the end of the manifesto, the authors call for a "forcible overthrow of all existing social conditions",  ..