Based on the information provided, here is the completed text using appropriate responses:
By 1860, the nation's system of railroads was much larger than its system of canals. Railroads were cheaper to build, and once completed, they transported goods and people much faster. They could also reach parts of the country where there weren't as many rivers. Both the canal and railroad systems were strongest in the northeast part of the country. These transportation systems made it easier to travel and ship goods over long distances. So, they made it more likely that people in different parts of the country would buy things from each other.