It can be inferred from the first paragraph that in the nineteenth century canals and railroads wereĐoạn văn58/103It can be inferred from the first paragraph that in the nineteenth century canals and railroads were _________.built with money that came from the federal government much more expensive to build than they had been previously built predominantly in the western part of the country sometimes built in part by state companiesGiải thíchChọn D