Answer:
The Cold War between the U.S. and Soviet Union originated from postwar disagreements, conflicting ideologies, and fears of expansionism. At both the Yalta Conference and Potsdam Conference, U.S. and Soviet leaders sharply disagreed over the future of the post-war world.

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The Cold War | Boundless US History
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They haven't... They are still bound by the same constitution that previous presidents have.
Answer: C
Explanation: The Civil War was fought over the moral ( issue of slavery ) . In fact, it was the economics of slavery and political control of that system that was central to the conflict. A key issue was states' rights.
By 1917, most Russians had lost faith in the leadership ability of the czarist regime. Government corruption was rampant, the Russian economy remained backward and Czar Nicholas II had repeatedly dissolved the Dumas, the Russian parliamentary groups established to placate the masses after the Revolution of 1905, each time they opposed his will. But the immediate cause of the February Revolution—the first phase of the more sweeping Russian Revolution of 1917—was Russia’s disastrous involvement in World War I.
For these reasons, the answer is B, the February Revolution was demolished and Russia eventually had to leave the war because they had this revolution but this was not the case with the October Revolution.
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