In the 25 years following the Civil War all of the following changes occurred in the railroad industry, EXCEPT:

a. A transcontinental line connected California to Omaha, Nebraska, and ultimately eastern cities.
b. Railroads grew from 35,000 miles of track to 167,000 miles.
c. Iron rails had been replaced with steel rails.
d. Railroad companies had expanded the number of gauges on which to transport their goods.


ANSWER: d

History

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