These industrial and transportation improvements connected the north, south, and west of america to unify the nation question 14 options: the development of air travel, the use of speed boats, and creation of interstates increased trade restrictions between states and worker strikes expanded transportation like the railroads and canals, water and steam power developed, and faster production in factories introduced child labor, the opening of wall street, and the creation of the automobile

The correct answer is C) expanded transportation like the railroads and canals, water and steam power developed, and faster production in factories.

The industrial and transportation improvements that connected the North, South, and West of America in a unified nation were expanded transportation like the railroads and canals, water and steam power developed, and faster production in factories.

When the United States decided to invest in better infrastructure in order to connect all the parts and regions of the country, the nation was unified and the result was an economy that grew and expanded.

For instance, the Transcontinental Railroad that connected the East with the West was an important step to transport people and goods, that resulted in a better trade.

both include an amendment process.