Which of these technologies was able to spread because of the growth of american railroad networks? the electric light bulb the telegraph the mechanical harvester the internal combustion engine

The correct answer is D) the internal combustion engine.

The technology that was able to spread because of the growth of American railroad networks was the internal combustion engine.

This is a heat engine that generates the combustion process in a chamber. The internal combustion engine makes cars, vehicles, and buses work. They use gasoline or diesel to make the combustion. The engine was created by Etienne Lenoir in 1859 and was perfectionated by Nikolaus Otto in 1876. The growth of American railroad networks helped to spread the internal combustion engine.

answer: d. joseph james clark​

explanation:

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.