Umm the boxes should look like this
Does it give you options to choose from?
/~\I believe the correct answer to this question is:
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<em><u>A. To prevent future wars by helping settle disputes.
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<em><u>B. To foster trade and communication among nations.</u></em>
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I hope this helps! /~\
United States train travel had changed dramatically by this time, since the transcontinental railroad had been completed, which stretched all the way from the Atlantic to the Pacific.