Late-19th century immigration to the united states would not have been possible without a) electricity. b) european wars. c) transatlantic flight. d) transatlantic steamships.

I'm gonna take a guess and say that the answer is D, translantic steamships. This is the most reasonable answer given that immigration of the mayflower was a ship.

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.

chemicals that are toxic to plants