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Which of these factors contributed most to US westward expansion in the second half of the nineteenth century?

A.
improved overland trails
B.
development of more railroad systems
C.
peace treaties with American Indians
D.
discovery of gold in Alaska

User Iflp
by
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2 Answers

4 votes
The answers is b not positive tho
User Mistero
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1 vote
The answer is B. Development of railroad systems.
User Trin
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