The correct answer is option A. "the Soviet Union built them too". The nuclear arms race took place during Cold War, and was a competition for supremacy in nuclear warfare between the United States and the Soviet Union. Under this competition if the United States built hydrogen bombs, the Soviet Union would built them too in order to stay in line with his competitor.
The countries of Europe were divided between the west half of Europe (US aligned) and the east half (Soviet aligned/ruled). The dividing line was in Europe's center going north-south along the Elbe river in the north. All the bigger countries in Europe (Britain, France, three fourths of Germany, Italy, Spain) were on the west side with the US.
The US side was a free alliance of democracies. The Soviet side was an unfree group of taken over countries, held prisoner by the Russian Soviet Union with Soviet Russian puppet communist dictatorships as governments. Economically the west side was a mixture of free market, capitalism, and European socialism. The east Soviet side was communist with totalitarian command economies.
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Answer:
The Greeks made important contributions to philosophy, mathematics, astronomy, and medicine. Literature and theatre was an important aspect of Greek culture and influenced modern drama. The Greeks were known for their sophisticated sculpture and architecture.