B. The Wright brothers . . .
The option is b, I hope this helps you!
Answer:
There are several factors of the end of the Cold War. The economies of the Soviet Union and of the Easten Bloc had become stagnated and technologically backward. The subsequent worsening of living standards and the aggravation of longtime, unsolved social issues made the situation even more complicated. The perestroika and the glasnost initiated by Soviet secretary-general Mikhail Gorbachev intented to promote social, political and economic reforms but they did not succeed; they brought instead instability and protests in the Soviet republics. Besides, the election of Ronald Reagan as US president put additional pressure on the USSR. Reagan promoted systems of new weapons and an ambitious space program that could not have been matched by Moscow. This combination of economic, social and diplomatic factors led to the end of the Cold War.
After the end of the Cold War, the US became the only superpower. With confidence after what it saw as its "victory" in the Cold War, American foreign policy became more unilateral.
Explanation:
Russia has been a notoriously difficult country to invade, given its large size and generally large population throughout history. Freezing winters have also played a role in helping protect Russia, which was famously noted in 1812 during Napoleon's failed invasion of Russia. In response to European nations who saw the new French government as threat to the balance of powers, Napoleon annexed various parts of Europe and launched an invasion of Russia with over 600,000 soldiers. Napoleon invaded in the summer of 1812, but long fighting and a scorched earth policy by Russian forces prolonged the fighting and when a harsh winter arrived, the French army that lacked in supplies was reduced to under 100,000 soldiers. Eventually, Napoleon conceded his defeat, and left Russia in December, 1812.
