Answer:
While the reforms of glasnost and perestroika were not the sole causes of the dissolution of the U.S.S.R., the forces they unleashed destabilized an already weakening system and hastened its end.
Explanation:
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The correct answer is answer C ("The article will be biased because the historian is using only one source about the ruler").
If a historian only took this one scroll to write a biography on its subject (the ruler), it would most likely be extremely misleading and inaccurate. There's no way of getting closer to the truth of any subject without contrasting a variety of opinions from different sources. What if people working for this ruler wrote it in a way that made him look good? What if it was written under pressure? What if it was a complete lie? These and many other questions should come to mind as possible ways in which relying on one source might compromise historical facts.
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Most of the Dust storms started in the southern Great Plains, especially the high plains regions of Texas, Oklahoma, Kansas, New Mexico, and Colorado.
Houston won the election in a landslide, carrying 77% of the vote to Smith's 13% and Austin's 10%. Mirabeau Lamar was elected vice president by a majority of 2,699 votes.