How was the roman empire different after constantine''s recognition of christianity?

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

How did europeans and africans displace native americans in north america’s predominant peoples?

The british commonwealth is: a. the national treasury. b. the british social services system. c. an alliance of former british colonies. d. a shared land for grazing sheep in britain.