The development of the railroads during the 1800s dramatically changed life in america in many ways. in which of the following ways did the railroads change life in america?
a. they opened new areas of the country to settlement
b. they divided parts of the country from each other.
c. they eliminated jobs because they were so efficient.
d. they improved the environment by decreasing pollution.

A

Explanation:

The railroads allowed settlers to travel greater distances, and they opened new areas of the country to settlement. Railroads changed people's perception of time and distance, as the journey west was much shorter and not nearly as dangerous as it had been before.

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.

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