I need help pls because I forgot the lession

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

Who was william johnson? a. a revolutionary war veteran b. was the most prominent free black in mississippi c. a field slave d. inventor of the cotton gin

How does nafta affect relations between the united states and canada? a. it bans immigration between the two countries. b. it opens the borders between the two countries. c. it raises taxes on trade between the two countries. d. it allows free trade between the two countries.