Which statement offers the clearest example of how improvements in communication technology helped unify the country?

A. Improvements in printing resulted in national, not just local,
newspapers.

B. The invention of the typewriter meant that citizens nationwide
used the same machines.

C. The invention of the telephone enabled instant communication
across the continent.

D. Mail delivery service in rural areas connected farmers with
families in their nearest city.

can you give me more details?

explanation:

i would say your answer would be the second option.

hope this !

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.