How did the transcontinental railroad affect communication? A. It made coast-to-coast communication happen almost instantly.
B. It made coast-to-coast communication more complicated and costly.
C. It reduced coast-to-coast communication from months to weeks.
D. It reduced coast-to-coast communication from a week to a day.

It reduced coast-to-coast communication from months to weeks.

Indeed, before the Transcontinental Railroad was completed it might take a traveler or settler months to do the same trip by wagon cart and weeks by boat through South America. By train it would take a traveler about two weeks to go from New York to San Francisco and in 1876 a train called the Transcontinental Express made the trip from New York to San Francisco in 83 hours and 39 minutes. It was not a regular train but a publicity stunt but it did show that the feat was possible.

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The railroad made the transportation of goods much more flexible, as well as faster and cheaper.It reduced coast-to-coast communication from a week to a day. ... It reduced coast-to-coast communication from months to weeks. It made coast-to-coast communication more complicated and costly.

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to extend a country’s power and influence