The best and most correct answer among the choices provided by your question is the second choice which is "railroad tracks."
<span>By 1860 the Midwest and the East were united by a network of railroad tracks.</span>
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Turkish Jonturkler, coalition of various reform groups that led revolutionary movement against the authorial regime of Ottoman sultan Abdulhamid II, which culminated in the establishment of a constitution government.
William Lloyd Garrison, and Arthur Tappan.
Answer: it’s A. a shift in American Indian populations from east to west
Explanation:
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