The reader can infer that the oregon trial migration of 1843 led to :

a. the discovery of gold
b. much disease and famine
c. the killing of many native americans
d. the building of many settlements

true

coz they had the rank system in society according to the economic power of the people

to extend a country’s power and influence

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.

very positive impact on our industries in the west, sine they promoted settlement and increased the ways in which goods could be transported to market.