1.which group of people on the great plains benefited most from the invention of barbed wire?

a.
native americans

b.
cowboys

c.
railroad workers

d.
farmers

2. which describes a major challenge facing the builders of the transcontinental railroad?

a.
bridging the rio grande river

b.
tunneling under lake erie

c.
spanning the grand canyon

d.
crossing the sierra nevada mountains

donald carl johanson (born june 28, 1943) is an american paleoanthropologist. he is known for discovering – with yves coppens and maurice taieb – the fossil of a female hominin australopithecine known as "lucy" in the afar triangle region of hadar, ethiopia.

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d) a week

because the land run of 1889, although not without precedent in the history of the west, further, their men were aboard the first trains, ready to jump off and begin staking their claims. oklahoma city, edmond, and guthrie were all so affected.