How did the construction of canals and railroads affect the national economy during the 19th century?

Canals bridge and railroads makes great affect in economy.

Explanation:

In the 19th century, rail lines were vital to economic development. They not only made it easier to export manufacturing and livestock goods around the world cheaply and easily, but they also aided the growth of other industries. Because of lower freight rates, modern modes of transportation improved the economy by lowering the cost of transporting goods around the world.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

the russian revolution of 1917 involved the collapse of an empire under tsar nicholas ii and the rise of marxian socialism under lenin and his bolsheviks.