How did native Americans entered North America?

Me i really need which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus

Explain how agricultural and textile factories impacted the economic development of south carolina.

The plantation economy in the south produced a. equal opportunity for all whites and no illiteracy. b. low profits despite the enslavement of a great number of people. c. great profits and developed great educational institutions. d. great profits at the expense of cultural development and equal opportunity.