Peter cooper invented the first when the lack of waterways in certain parts of the united states required new modes of transportation.
(a) steamboat
(b) steam locomotive
(c) automobile
(d) airplane

(B) steam locomotive

Explanation:

In 1830, Peter Cooper, a well known and established inventor managed to invent and construct the first steam locomotive. He even bought a land as to have space where the test it and run it to be assured that it came out as planned. Once he introduced his invention on the market, everyone was fascinated and immediately saw the enormous potential this invention had. Not all of the country was connected through major waterways, so lot of parts were cut out. The steam locomotive though was moving on the railroads, thus on land, and it was able to reach every part of the country if the infrastructure was set up. This invention resulted in large scale migrations toward the west, easier trade and transportation of raw materials and goods, rapidly leading to economic boom.

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b. ensure mutual protection from communism.

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