Which diagram shows how the completion of the transcontinental railroad contributed to the closing of the western frontier?
Improved
communications
-
Increased
protection of
be to
American Indans
Greater ease
of travel
Higher demand
for unciaimed
territory
Advances in
factory
technology
Improved
agricultural
processes
Faster shipping
More profits
for timber
COmpanies
D
materials
A
B
OD