How did improvements in printing affect the Tang and Sung dynasties? Choose two correct answers. gave more people access to literature
made China less vulnerable to invasion
allowed use of paper currency for trade
led to stronger ties with Korea and Japan
encouraged dependence on foreign trade

it gave more access to literature and allowed use of paper for currency in trade

Explanation:

got it right on edge test

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.