The last answer is correct. Hope this helps.
Answer: B ) The arms race
Explanation: The nuclear arms race was an arms race competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. During this very period, in addition to the American and Soviet nuclear stockpiles, other countries developed nuclear weapons, though none engaged in warhead production on nearly the same scale as the two superpowers.
I'm pretty sure the answer for this is:
C. A philosophy of government that advocates for a strong central government
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The Great Rift Valley<span> is part of an intra-continental ridge system that runs through </span>Kenya<span> from north to south. It is part of the </span>Gregory Rift<span>, the eastern branch of the </span>East African Rift<span>, which starts in </span>Tanzania<span> to the south and continues northward into </span>Ethiopia. <span>It was formed on the "Kenyan Dome" a geographical upwelling created by the interactions of three major tectonics: the Arabian, Nubian, and Somalian plates. </span><span>In the past, it was seen as part of a "</span>Great Rift Valley<span>" that ran from </span>Madagascar<span> to </span>Syria<span>. Most of the valley falls within the former </span>Rift Valley Province<span>.</span>