They benefited from canals and railroads.
The correct option is C : They reduced tensions with the soviet union by encouraging cooperation between the superpowers.
US foreign policy
The officially stated goals of the foreign policy of the United States of America, including all the bureaus and offices in the United States Department of State, as mentioned in the Foreign Policy Agenda of the Department of State, are "to build and sustain a more democratic, secure, and prosperous world for the benefit of the American people and the international community".
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Describe the current United States foreign policy of internationalism.
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Perhaps in the Civil War era, the Dred Scott decision angered Abolitionists as the Supreme Court declared African Americans could not be a US citizen as they were not mentioned as as in the Constitution and that Congress abused their power by abolishing Slavery above the Mason Dixon line and in the New Western territories.
Northerners and famously Fredrick Douglass denounced the court ruling.<span />
The United Nations is an international "<span>b. peacekeeping force" since it was established after World War II with the intent of making sure that a third world war never occurred. </span>