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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Answer:
Because that is where scientists believe the first humans originated from, and where the earliest civilizations started.
Answer:
For art of for spiritual reasoning.
Explanation:
Answer: The domination of other European countries.
Explanation: The way it relates is because both Allied forces and Central powers wanted to dominate more land to defeat their opponent.