Answer:
B. decreased Cold War tensions because people felt safe from nuclear attack on their homelands
Explanation:
"The war is won," he said in December 1945, "but the peace is not." The development of the atomic bomb and the subsequent arms race between the United States and the Soviet Union ushered in a new conflict: the Cold War. Einstein feared this battle would end with the destruction of civilization.
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C. To present military interventions. Clinton was president when the Iran and Libya situations were going on, and his response was to increase the military presence.
The main reason the United States government intervened in the Great Railroad Strike of 1877 was because it was leaving thousands of people without transportation, which meant that the US GDP was decreasing in hurting business of all kinds.
The Ice Age had a great effect on where people settled in americans since they were only able to reach North America through the Bering Land Bridge, which was only frozen due to the extremely low temperatures. Without this they would have had no way to leave Siberia.