Assuming you mean the Great Plains of the USA- it boosted their sales because of the government buying more wheat to ship overseas to assist in refugee and military supplies, assuming the farmer(s) were not drafted into military service themselves.
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Mikhail Sergeyevich Gorbachev[e] (born 2 March 1931) is a Russian and former Soviet politician. The eighth and last leader of the Soviet Union, he was the General Secretary of the Communist Party of the Soviet Union from 1985 until 1991. He was also the country's head of state from 1988 until 1991, serving as the chairman of the Presidium of the Supreme Soviet from 1988 to 1989, chairman of the Supreme Soviet from 1989 to 1990, and president of the Soviet Union from 1990 to 1991. Ideologically, Gorbachev initially adhered to Marxism–Leninism, although he had moved towards social democracy by the early 1990s.
Mount Paricutin is a cinder cone volcano. The correct option among all the options that are given in the question is the second option. Mount Paricutin was discovered in Mexico in the year 1943. It is not a high volcano as it is made of ash. This kind of volcano creates less destruction for the people living near its vicinity.
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International trade left to its natural course without tariffs, quotas, or other restrictions.