How did the railroad impact migration and settlement of the american west ?

what the question i might be able to

"globalization has greatly impacted the united states and american citizens. first and foremost, globalization has spread american influence throughout the world. globalization has opened up more markets for the united states, which in effect american companies sell their products worldwide. there has been a rise of multinational corporations and their influence has greatly increased."

i believe the correct answer is b.

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