Answer:B
Explanation:
Christopher Columbus introduced horses, sugar plants, and disease to the New World, while facilitating the introduction of New World commodities like sugar, tobacco, chocolate, and potatoes to the Old World. The process by which commodities, people, and diseases crossed the Atlantic is known as the Columbian Exchange.
Answer:
It was an decision that the U.S Supreme court in which the court ruled the American state laws establishing racial segregation in public schools unconstitutional, even if the segregated schools are other wise equal in quality.
Explanation:
<span>For post-1991 relations, see Sino-Russian relations since 1991. See also History of Sino-Russian relations and History of foreign relations of the People's Republic of China.For modern Taiwan-Russia relations, see Russia–Taiwan relations.</span>
Sino-Soviet relations (simplified Chinese: <span>中苏关系</span>; traditional Chinese: <span>中蘇關係</span>; pinyin: Zhōng Sū Guānxì; Russian: Советско-китайские отношения, Sovetsko-kitayskiye otnosheniya) refers to the diplomatic relationship between the Chinese Republic and the various forms of Soviet Power which emerged from the Russian Revolution of 1917 to 1991, when the Soviet Union ceased to exist.
In the civil war 750,000 Americans died.
